A360018 - cp's OEIS frontend

A360018 Expansion of Sum_{k>=0} (k * x * (1 + (k * x)^2))^k.

n	a(n)
0	1
1	1
2	4
3	28
4	288
5	3854
6	63104
7	1220729
8	27248128
9	689446671
10	19501121536
11	609753349945
12	20883798220800
13	777529328875208
14	31266494467227648
15	1350520199148276667
16	62360172065142341632
17	3065369553470816704832
18	159818389764050045894656

[1, 1, 4, 28, 288, 3854, 63104, 1220729, 27248128, 689446671, 19501121536, 609753349945, 20883798220800, 777529328875208, 31266494467227648, 1350520199148276667, 62360172065142341632, 3065369553470816704832, 159818389764050045894656]

cp's OEIS Frontend

A360018 Expansion of Sum_{k>=0} (k * x * (1 + (k * x)^2))^k.

Table of values

List of values