469300

Appears in sequences

• a(n) = (n+1)^2 * (n+2)^2 * (2*n+3) / 12.at n=18A108674
• a(n) = n*(1 - (-1)^n - 2*(3 + (-1)^n)*n^2 + 2*n^4)/384.at n=39A350689