651168

Appears in sequences

• Coordination sequence for diamond structure D^+_6. (Edges defined by l_1 norm = 1.)at n=19A035879
• If X_1,...,X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 5-subsets of X containing none of X_i, (i=1,...n).at n=16A130811
• Triangle read by rows: T(n, k) = binomial(2*n, n + k) * binomial(n + 1, k)/(n + 1).at n=60A286784
• Triangle read by rows, interpolating between the central binomial coefficients and the central coefficients of the Catalan triangle. T(n, k) for 0 <= k <= n.at n=33A330798