A306731 - cp's OEIS frontend

A306731 Expansion of Sum_{k>=0} x^k * Product_{j=1..k} (1 + x^j)^j.

n	a(n)
0	1
1	1
2	2
3	2
4	4
5	6
6	10
7	14
8	24
9	37
10	56
11	90
12	135
13	204
14	316
15	474
16	704
17	1068
18	1579
19	2332
20	3445
21	5054
22	7376
23	10750
24	15587
25	22497
26	32437
27	46544
28	66520
29	94908
30	134912
31	191185
32	270301
33	380924
34	535469
35	750898
36	1050268
37	1465284
38	2039741
39	2832694
40	3925036
41	5427381
42	7488315
43	10310431

[1, 1, 2, 2, 4, 6, 10, 14, 24, 37, 56, 90, 135, 204, 316, 474, 704, 1068, 1579, 2332, 3445, 5054, 7376, 10750, 15587, 22497, 32437, 46544, 66520, 94908, 134912, 191185, 270301, 380924, 535469, 750898, 1050268, 1465284, 2039741, 2832694, 3925036, 5427381, 7488315, 10310431]

cp's OEIS Frontend

A306731 Expansion of Sum_{k>=0} x^k * Product_{j=1..k} (1 + x^j)^j.

Table of values

List of values