a(0) = 1; a(n) = n! * Sum_{k=1..n} binomial(n-1,k-1) * H(k) * a(n-k) / (n-k)!, where H(k) is the k-th harmonic number.
A336290
a(0) = 1; a(n) = n! * Sum_{k=1..n} binomial(n-1,k-1) * H(k) * a(n-k) / (n-k)!, where H(k) is the k-th harmonic number.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =44a(4) =628a(5) =12994a(6) =363548a(7) =13141974a(8) =593579712a(9) =32644440048
External references
- oeis: A336290