A304627 - cp's OEIS frontend

A304627 a(n) = [x^n] Product_{k>=1} (1 + x^k)(1 - x^(nk))/((1 - x^k)(1 + x^(nk))).

n	a(n)
0	1
1	0
2	2
3	6
4	12
5	22
6	38
7	62
8	98
9	152
10	230
11	342
12	502
13	726
14	1038
15	1470
16	2060
17	2862
18	3946
19	5398
20	7334
21	9902
22	13286
23	17726
24	23526
25	31064
26	40822
27	53406
28	69566
29	90246
30	116622
31	150142
32	192610
33	246254
34	313806
35	398638
36	504884
37	637590
38	802934
39	1008446
40	1263270
41	1578526
42	1967694
43	2447062

[1, 0, 2, 6, 12, 22, 38, 62, 98, 152, 230, 342, 502, 726, 1038, 1470, 2060, 2862, 3946, 5398, 7334, 9902, 13286, 17726, 23526, 31064, 40822, 53406, 69566, 90246, 116622, 150142, 192610, 246254, 313806, 398638, 504884, 637590, 802934, 1008446, 1263270, 1578526, 1967694, 2447062]

cp's OEIS Frontend

A304627 a(n) = [x^n] Product_{k>=1} (1 + x^k)(1 - x^(nk))/((1 - x^k)(1 + x^(nk))).

Table of values

List of values

cp's OEIS Frontend

A304627 a(n) = [x^n] Product_{k>=1} (1 + x^k)*(1 - x^(n*k))/((1 - x^k)*(1 + x^(n*k))).

Table of values

List of values

A304627 a(n) = [x^n] Product_{k>=1} (1 + x^k)(1 - x^(nk))/((1 - x^k)(1 + x^(nk))).