242556
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=4A029549
- Eighth column of quintinomial coefficients.at n=15A064057
- Triangular numbers whose largest proper divisor is also triangular.at n=7A076170
- Duplicate of A029549.at n=4A076715
- Sum of the areas of the first n+1 Pell triangles.at n=8A096979
- Triangular numbers representable as x!/y! with y < x-1.at n=6A227027
- Triangular numbers that are the product of a triangular number and an oblong number.at n=33A253652
- Triangle T(n, k) read by rows, n > 0 and 0 < k <= 3^(n-1): T(n, k) = A321768(n, k) * A321769(n, k) / 2.at n=26A322170