191448941

Appears in sequences

• a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} Sum_{l=0..n} (i+j+k+l)!/(i!*j!*k!*l!).at n=4A144661
• Number of sequences with up to n copies each of 1,2,...,n.at n=4A274762
• A(n,k) = Sum_{i_1=0..n} Sum_{i_2=0..n} ... Sum_{i_k=0..n} multinomial(i_1 + i_2 + ... + i_k; i_1, i_2, ..., i_k), square array A(n,k) read by antidiagonals, for n >= 0, k >= 0.at n=40A308292
• a(n) = Sum_{i_1=0..4} Sum_{i_2=0..4} ... Sum_{i_n=0..4} multinomial(i_1 + i_2 + ... + i_n; i_1, i_2, ..., i_n).at n=4A308295