810901
domain: N
Appears in sequences
- a(n) = (n^2 - n + 1)*(n^2 + n + 1).at n=30A059826
- Triangular numbers with property that digits alternate in parity individually as well as in concatenation with previous terms.at n=38A068889
- Triangular numbers of the form k^2 + k + 1.at n=8A069017
- Triangular numbers that are the difference of nonnegative cubes.at n=23A129965
- Hexagonal numbers (A000384) that are the sum of two consecutive hexagonal numbers.at n=1A257721
- Triangular numbers that can be represented as a sum of two distinct triangular numbers, and as a product of two triangular numbers greater than 1.at n=25A295768
- Hexagonal numbers that are products of smaller hexagonal numbers.at n=8A374373