6370650

Appears in sequences

• a(n) = binomial(n+8,8)*binomial(n+12,8).at n=4A104478
• a(n) = binomial(n+4,n)*binomial(n+8,n).at n=8A105251
• Irregular triangle, read by rows, T(n, k) = binomial(2*n, k)*binomial(2*k, k).at n=44A156789
• a(n) = binomial(4*n,2*n)*binomial(3*n,2*n).at n=4A275653
• Square array read by ascending antidiagonals: T(n,k) = [x^k] (1 - x)^(2*k) * Legendre_P(n*k, (1 + x)/(1 - x)) for n, k >= 0.at n=40A364303
• Numbers k of the form 4u+2 such that sigma(k) AND 3*k = 3*k, where AND is bitwise-and, A004198.at n=1A388023