623529

Appears in sequences

• a(n) = n! * Sum_{k=1..n-1} 1/k!.at n=9A038156
• Multiply by 1, add 1, multiply by 2, add 2, etc.at n=18A082459
• Triangle read by rows: T(i,j) for the recurrence T(i,j) = (T(i-1,j) + 1)*i.at n=37A121662
• Triangle read by rows: T(m,n) = Sum_{i=1..n} P(m,i) where P(m,n) = m!/(m-n)! is the number of permutations of m items taken n at a time, for 1 <= n <= m.at n=43A285268
• Expansion of e.g.f. (exp(x)-x)*x/(1-x).at n=9A296964