78664

Appears in sequences

• a(n+1) = Sum_{k=0..n} (n!/k!)*binomial(n,k)*a(k).at n=7A110083
• Triangle, read by rows, where T(n,k) = T(n,k-1) + n*T(n-1,k-1) for n>0 and k>0, with T(n,0) = T(n-1,n-1) for n>0 and T(0,0) = 1.at n=27A132007
• Triangle, read by rows, where T(n,k) = T(n,k-1) + n*T(n-1,k-1) for n>0 and k>0, with T(n,0) = T(n-1,n-1) for n>0 and T(0,0) = 1.at n=28A132007
• Number of 2 X 2 nonsingular 0..n matrices with rows in increasing order.at n=18A183761