305970

Appears in sequences

• a(n) = (2*n+1)*(3*n+1)*(4*n+1).at n=23A033591
• Triangle T(n,k) read by rows, where o.g.f. for T(n,k) is n!*Sum_{k=0..n} (1+x)^(n-k)/k!.at n=31A073474