a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} 1 / (1 - x^k/k!).
A338436
a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} 1 / (1 - x^k/k!).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =28a(5) =245a(6) =726a(7) =11480a(8) =48560a(9) =735705a(10) =4352050a(11) =98329550a(12) =483122388a(13) =15543026746a(14) =105478954140
External references
- oeis: A338436