321126400

Appears in sequences

• Number of domino tilings of the order n Aztec diamond which are centrally symmetric.at n=10A372145
• a(n) = 2^(n-3)*(3*binomial(n,4) + 4*binomial(n,2) + 8).at n=18A383868
• a(n) = [x^n] hypergeom([1/2, 1/2], [1], 256*x).at n=4A387488