70816

Appears in sequences

• Number of binary strings of length n with equal numbers of 00010 and 01001 substrings.at n=17A164215
• Number of 3-step one or two space at a time rook's tours on an n X n board summed over all starting positions.at n=36A187288
• a(n) = Sum_{k=0..floor(n/2)} 2^k * binomial(2*k,2*n-4*k).at n=15A387762