223154201664
domain: N
Appears in sequences
- a(n) = 64*9^(n-2), a(0)=1, a(1)=7.at n=12A055995
- Number of shapes of balanced 9-ary trees with n nodes, where a tree is balanced if the total number of nodes in subtrees corresponding to the branches of any node differ by at most one.at n=21A229394
- Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum equal to the antidiagonal sum or central row sum equal to the central column sum.at n=19A258918