A304629 - cp's OEIS frontend

A304629 a(n) = [x^n] Product_{k>=1} ((1 + x^k)/(1 + x^(5*k)))^n.

n	a(n)
0	1
1	1
2	3
3	13
4	51
5	201
6	819
7	3389
8	14131
9	59341
10	250703
11	1064207
12	4535091
13	19390229
14	83139955
15	357354213
16	1539272499
17	6642769925
18	28714955571
19	124312591469
20	538895612751
21	2338948779320
22	10162837993377
23	44202371860240
24	192431323820851
25	838442649862701
26	3656031108325651

[1, 1, 3, 13, 51, 201, 819, 3389, 14131, 59341, 250703, 1064207, 4535091, 19390229, 83139955, 357354213, 1539272499, 6642769925, 28714955571, 124312591469, 538895612751, 2338948779320, 10162837993377, 44202371860240, 192431323820851, 838442649862701, 3656031108325651]

cp's OEIS Frontend

A304629 a(n) = [x^n] Product_{k>=1} ((1 + x^k)/(1 + x^(5*k)))^n.

Table of values

List of values