818800

Appears in sequences

• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = (odd natural numbers).at n=39A025083
• Expansion of 1/((1-2x^2)sqrt(1-4x)).at n=11A106189