50440
domain: N
Appears in sequences
- a(n) = n*(3^n - 2^n).at n=8A004142
- Truncated tetrahedral numbers: a(n) = (1/6)*(n+1)*(23*n^2 + 19*n + 6).at n=23A005906
- Octagonal numbers which are the sums of exactly two positive octagonal numbers.at n=22A136346
- Number of right triangles on a (n+1)X9 grid.at n=18A189813
- p-INVERT of (1,1,1,1,1,...), where p(S) = (1 - S)^2 * (1 - 2*S).at n=8A291011
- Number of pairs (lambda,mu) of partitions lambda of n and mu of seven with mu <= lambda (by diagram containment).at n=21A303857