484096

Appears in sequences

• Number of cyclic subgroups of order 3 of general affine group AGL(n,2).at n=4A063406
• a(n) = (1/2) * Sum_{k=0..floor(n/3)} 2^(n-k) * binomial(2*n-4*k+2,2*k+1).at n=10A387603