A376853 - cp's OEIS frontend

A376853 G.f.: Sum_{k>=0} x^(k(k+1)/2) Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.

n	a(n)
0	1
1	1
2	4
3	9
4	16
5	28
6	49
7	84
8	140
9	228
10	361
11	560
12	856
13	1288
14	1916
15	2821
16	4108
17	5928
18	8480
19	12024
20	16920
21	23637
22	32788
23	45196
24	61928
25	84368
26	114332
27	154160
28	206857
29	276308
30	367476
31	486680
32	641996
33	843656
34	1104592
35	1441168
36	1873965
37	2428816
38	3138132
39	4042408
40	5192132

[1, 1, 4, 9, 16, 28, 49, 84, 140, 228, 361, 560, 856, 1288, 1916, 2821, 4108, 5928, 8480, 12024, 16920, 23637, 32788, 45196, 61928, 84368, 114332, 154160, 206857, 276308, 367476, 486680, 641996, 843656, 1104592, 1441168, 1873965, 2428816, 3138132, 4042408, 5192132]

cp's OEIS Frontend

A376853 G.f.: Sum_{k>=0} x^(k(k+1)/2) Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.

Table of values

List of values

cp's OEIS Frontend

A376853 G.f.: Sum_{k>=0} x^(k*(k+1)/2) * Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.

Table of values

List of values

A376853 G.f.: Sum_{k>=0} x^(k(k+1)/2) Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.