667800

Appears in sequences

• Triangle read by rows: T(n,k) is the number of compositions of set {1, 2, ..., k} into exactly n blocks, each of size 1, 2 or 3 (n >= 0, 0 <= k <= 3*n).at n=44A189804
• Expansion of e.g.f. -log(1 - x - x^2/2).at n=8A328286