A369358 - cp's OEIS frontend

A369358 a(n) is the constant term in expansion of Product_{k=1..n} (x^(k^4) + 1 + 1/x^(k^4)).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	3
10	3
11	15
12	25
13	59
14	109
15	227
16	525
17	1321
18	2917
19	7085
20	15893
21	38759
22	90179
23	223933
24	534867
25	1339691
26	3246961
27	8296441
28	20426971
29	52715563
30	131480623
31	342491253
32	864759837
33	2270860455
34	5793103989
35	15316065497
36	39429185075
37	105008858223

[1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 15, 25, 59, 109, 227, 525, 1321, 2917, 7085, 15893, 38759, 90179, 223933, 534867, 1339691, 3246961, 8296441, 20426971, 52715563, 131480623, 342491253, 864759837, 2270860455, 5793103989, 15316065497, 39429185075, 105008858223]

cp's OEIS Frontend

A369358 a(n) is the constant term in expansion of Product_{k=1..n} (x^(k^4) + 1 + 1/x^(k^4)).

Table of values

List of values