68588311

Appears in sequences

• a(n) = n! * Sum_{k=1..n-1} 1/k!.at n=11A038156
• Multiply by 1, add 1, multiply by 2, add 2, etc.at n=22A082459
• a(n) = Sum_{r < n, gcd(r,n)=1} n!/r!.at n=10A110377
• Expansion of e.g.f. (exp(x)-x)*x/(1-x).at n=11A296964