A360730 - cp's OEIS frontend

A360730 Expansion of Sum_{k>=0} (k * x * (1 + k*x^2))^k.

n	a(n)
0	1
1	1
2	4
3	28
4	272
5	3368
6	50768
7	902397
8	18481408
9	428556075
10	11099001600
11	317544062217
12	9946366838784
13	338537433281448
14	12441407233436672
15	491002325860132371
16	20710640842719301632
17	929821866165431838038
18	44270378887441746923520

[1, 1, 4, 28, 272, 3368, 50768, 902397, 18481408, 428556075, 11099001600, 317544062217, 9946366838784, 338537433281448, 12441407233436672, 491002325860132371, 20710640842719301632, 929821866165431838038, 44270378887441746923520]

cp's OEIS Frontend

A360730 Expansion of Sum_{k>=0} (k * x * (1 + k*x^2))^k.

Table of values

List of values