A335501 - cp's OEIS frontend

A335501 a(0) = 1; a(n) = (2/n) * Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).

n	a(n)
0	1
1	2
2	10
3	86
4	1098
5	19142
6	431926
7	12150518
8	414474570
9	16781350694
10	792845706630
11	43107783435158
12	2666346336398454
13	185796230244565462
14	14464057604306584774
15	1248919312238777955086
16	118855834572748011228490
17	12397162719421869533115622

[1, 2, 10, 86, 1098, 19142, 431926, 12150518, 414474570, 16781350694, 792845706630, 43107783435158, 2666346336398454, 185796230244565462, 14464057604306584774, 1248919312238777955086, 118855834572748011228490, 12397162719421869533115622]

cp's OEIS Frontend

A335501 a(0) = 1; a(n) = (2/n) * Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).

Table of values

List of values