A370243 - cp's OEIS frontend

A370243 Coefficient of x^n in the expansion of ( 1/(1-x) * (1+x^2)^2 )^n.

n	a(n)
0	1
1	1
2	7
3	28
4	143
5	701
6	3580
7	18376
8	95471
9	499231
10	2626607
11	13883904
12	73681316
13	392323868
14	2094932728
15	11214085328
16	60157698287
17	323325959395
18	1740682221829
19	9385343934124
20	50671846382743
21	273913020523933
22	1482311190765896
23	8029798017622048
24	43538300361416708

[1, 1, 7, 28, 143, 701, 3580, 18376, 95471, 499231, 2626607, 13883904, 73681316, 392323868, 2094932728, 11214085328, 60157698287, 323325959395, 1740682221829, 9385343934124, 50671846382743, 273913020523933, 1482311190765896, 8029798017622048, 43538300361416708]

cp's OEIS Frontend

A370243 Coefficient of x^n in the expansion of ( 1/(1-x) * (1+x^2)^2 )^n.

Table of values

List of values