Total no. of terms | Infinity |
---|---|
Subsequence of | Polyhedral numbers |
Formula | |
First terms | 1, 5, 15, 35, 69, 121, 195 |
OEIS index |
|
A centered tetrahedral number is a centered figurate number that represents a tetrahedron. That is, it counts the dots in a three-dimensional dot pattern with a single dot surrounded by tetrahedral shells. [1] The th centered tetrahedral number, starting at for a single dot, is: [2] [3]
The first such numbers are: [1] [2]
Total no. of terms | Infinity |
---|---|
Subsequence of | Polyhedral numbers |
Formula | |
First terms | 1, 5, 15, 35, 69, 121, 195 |
OEIS index |
|
A centered tetrahedral number is a centered figurate number that represents a tetrahedron. That is, it counts the dots in a three-dimensional dot pattern with a single dot surrounded by tetrahedral shells. [1] The th centered tetrahedral number, starting at for a single dot, is: [2] [3]
The first such numbers are: [1] [2]