79616

Appears in sequences

• Number of 6-element nondividing subsets of {1, 2, ..., n}.at n=34A187493
• Number of edges in the hyperoctahedral (or cocktail party) graph of order n.at n=16A368757
• a(n) = (1/2) * Sum_{k=0..floor(n/3)} 2^(n-2*k) * binomial(2*k+2,2*n-6*k+1).at n=19A387556