A336289 - cp's OEIS frontend

A336289 a(0) = 1; a(n) = n! * Sum_{k=1..n} binomial(n-1,k-1) * (k-1)! * H(k) * a(n-k) / (n-k)!, where H(k) is the k-th harmonic number.

n	a(n)
0	1
1	1
2	5
3	55
4	1054
5	31046
6	1299386
7	73211510
8	5338080280
9	488727800664
10	54865512897432
11	7408400404206792
12	1184230737883333680
13	221121985937352261360
14	47683177920267470877648
15	11758982455716373002624816
16	3287966057434181416523799936

[1, 1, 5, 55, 1054, 31046, 1299386, 73211510, 5338080280, 488727800664, 54865512897432, 7408400404206792, 1184230737883333680, 221121985937352261360, 47683177920267470877648, 11758982455716373002624816, 3287966057434181416523799936]

cp's OEIS Frontend

A336289 a(0) = 1; a(n) = n! * Sum_{k=1..n} binomial(n-1,k-1) * (k-1)! * H(k) * a(n-k) / (n-k)!, where H(k) is the k-th harmonic number.

Table of values

List of values