78370

Appears in sequences

• a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (F(2), F(3), ...).at n=18A024591
• Principal diagonal of the convolution array A213587.at n=9A213588