29443957164
domain: N
Appears in sequences
- a(n) = (n+1)*(n+6)*3^n/6.at n=18A080420
- Sum of the lengths of the drops in all ternary words of length n on {0,1,2}. The drops of a ternary word on {0,1,2} are the subwords 10,20 and 21, their lengths being the differences 1, 2 and 1, respectively.at n=19A120908
- Number of n X 2 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.at n=9A269270