A316587 - cp's OEIS frontend

A316587 a(n) = [x^(2n)y^n] Product_{i>=1} 1/((1-x^(2i-1)y^i)(1-x^(2i-1)y^(i-1))(1-x^(2i)y^i)^2).

n	a(n)
0	1
1	3
2	10
3	27
4	69
5	161
6	361
7	767
8	1578
9	3134
10	6064
11	11432
12	21105
13	38175
14	67863
15	118658
16	204455
17	347439
18	583063
19	966952
20	1586231
21	2575474
22	4141832
23	6600731
24	10430455
25	16349788
26	25434178
27	39280676
28	60250276
29	91810915
30	139034070
31	209294256
32	313269591
33	466343647

[1, 3, 10, 27, 69, 161, 361, 767, 1578, 3134, 6064, 11432, 21105, 38175, 67863, 118658, 204455, 347439, 583063, 966952, 1586231, 2575474, 4141832, 6600731, 10430455, 16349788, 25434178, 39280676, 60250276, 91810915, 139034070, 209294256, 313269591, 466343647]

cp's OEIS Frontend

A316587 a(n) = [x^(2n)y^n] Product_{i>=1} 1/((1-x^(2i-1)y^i)(1-x^(2i-1)y^(i-1))(1-x^(2i)y^i)^2).

Table of values

List of values