A352658 - cp's OEIS frontend

A352658 a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * binomial(k+1,2) * k * a(n-k).

n	a(n)
0	1
1	1
2	5
3	39
4	508
5	9235
6	224481
7	6959932
8	266492388
9	12302514945
10	671505310855
11	42664357009186
12	3114726872133570
13	258452373177094213
14	24149855477595375815
15	2520813303733886387220
16	291892618561012451083816
17	37264133443594227118861233
18	5216461719269145457350349359

[1, 1, 5, 39, 508, 9235, 224481, 6959932, 266492388, 12302514945, 671505310855, 42664357009186, 3114726872133570, 258452373177094213, 24149855477595375815, 2520813303733886387220, 291892618561012451083816, 37264133443594227118861233, 5216461719269145457350349359]

cp's OEIS Frontend

A352658 a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * binomial(k+1,2) * k * a(n-k).

Table of values

List of values