A369433 - cp's OEIS frontend

A369433 a(n) = [x^n] Product_{k=1..n} (x^(k^2) + 1 + 1/x^(k^2)).

n	a(n)
0	1
1	1
2	0
3	1
4	3
5	5
6	7
7	13
8	35
9	82
10	168
11	409
12	1035
13	2540
14	6262
15	16068
16	41474
17	107259
18	279256
19	736359
20	1953946
21	5205746
22	13938670
23	37567522
24	101675407
25	276158642
26	752927255
27	2060852216
28	5658658210
29	15582628517
30	43032891276
31	119166025289
32	330808837377

[1, 1, 0, 1, 3, 5, 7, 13, 35, 82, 168, 409, 1035, 2540, 6262, 16068, 41474, 107259, 279256, 736359, 1953946, 5205746, 13938670, 37567522, 101675407, 276158642, 752927255, 2060852216, 5658658210, 15582628517, 43032891276, 119166025289, 330808837377]

cp's OEIS Frontend

A369433 a(n) = [x^n] Product_{k=1..n} (x^(k^2) + 1 + 1/x^(k^2)).

Table of values

List of values