9508687656
domain: N
Appears in sequences
- a(n + 3) = 35*a(n + 2) - 35*a(n + 1) + a(n), with a(0) = 0, a(1) = 6, a(2) = 210.at n=7A029549
- Triangular numbers whose largest proper divisor is also triangular.at n=12A076170
- Duplicate of A029549.at n=7A076715
- Sum of the areas of the first n+1 Pell triangles.at n=14A096979
- Triangular numbers representable as x!/y! with y < x-1.at n=11A227027