From Wikipedia, the free encyclopedia
Natural number
30,000 (thirty thousand ) is the
natural number that comes after 29,999 and before 30,001.
Selected numbers in the range 30001–39999
33333 =
repdigit
33461 = Pell number,
[11] Markov number
[12]
33511 = square pyramidal number
33781 = octahedral number
[4]
36100 = sum of the cubes of the first 19 positive integers
36463 – number of parallelogram polyominoes with 14 cells
[18]
36594 = octahedral number
[4]
38024 = square pyramidal number
38209 = n such that n | (3n + 5)
[20]
38416 = 144
38501 = 74 + 1902 : Friedlander-Iwaniec prime.
[21] Smallest prime separated by at least 40 from the nearest primes (38461 and 38543). It is thus an
isolated prime .
[22]
Chen prime .
[23]
38807 = number of non-equivalent ways of expressing 10,000,000 as the sum of two prime numbers
[24]
38962 =
Kaprekar number
[25]
39299 = Integer connected with coefficients in expansion of Weierstrass P-function
[26]
39304 = 343
39559 = octahedral number
[4]
39648 = tetranacci number
[27]
There are 958 prime numbers between 30000 and 40000.
^
Sloane, N. J. A. (ed.).
"Sequence A002110 (Primorial numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A001599 (Harmonic or Ore numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
c
Sloane, N. J. A. (ed.).
"Sequence A002411 (Pentagonal pyramidal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
c
d
Sloane, N. J. A. (ed.).
"Sequence A005900 (Octahedral numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A000041 (a(n) is the number of partitions of n (the partition numbers))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Weisstein, Eric W.
"Prime Gaps" .
MathWorld .
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A007530 (Prime quadruples: numbers k such that k, k+2, k+6, k+8 are all prime)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A051015 (Zeisel numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A088959 (Lowest numbers which are d-Pythagorean decomposable, i.e., square is expressible as sum of two positive squares in more ways than for any smaller number)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A076980 (Leyland numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000129 (Pell numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A002559 (Markoff (or Markov) numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000178 (Superfactorials)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
"Why was 34,969 Count von Count's magic number?" . BBC News . 2012-08-30. Retrieved 2012-08-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A000073 (Tribonacci numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A005165 (Alternating factorials)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A195163 (1000-gonal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A006958 (Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
"Sloane's A000682 : Semimeanders" . The On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-06-15 .
^
Sloane, N. J. A. (ed.).
"Sequence A277288 (Positive integers n such that n | (3^n + 5))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A028916 (Friedlander-Iwaniec primes: Primes of form a^2 + b^4)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A023186 (Lonely (or isolated) primes)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A109611 (Chen primes: primes p such that p + 2 is either a prime or a semiprime)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A065577 (Number of Goldbach partitions of 10^n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2023-08-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A006886 (Kaprekar numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A002770 (Weierstrass P-function)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000078 (Tetranacci numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
100,000
1,000,000
10,000,000
100,000,000
1,000,000,000