228690

Appears in sequences

• Binomial(n-k,k) * binomial(n-k-1,k+1) where k = ceiling(n/4).at n=15A171002
• Number of n-step closed paths on the E7 lattice.at n=4A292882
• Triangle T(n,m) = C(2*n,m)*C(2*n-1,n), 0 <= m <= 2*n, n >= 0.at n=40A320327
• Triangle T(n,m) = C(2*n,m)*C(2*n-1,n), 0 <= m <= 2*n, n >= 0.at n=44A320327