A306730 - cp's OEIS frontend

A306730 Expansion of Sum_{k>=0} x^k * Product_{j=1..k} (1 + j*x^j).

n	a(n)
0	1
1	1
2	2
3	2
4	4
5	6
6	9
7	12
8	22
9	32
10	45
11	70
12	98
13	153
14	231
15	318
16	452
17	685
18	933
19	1387
20	1988
21	2769
22	3850
23	5433
24	7622
25	10530
26	14896
27	20635
28	28123
29	38934
30	53067
31	72144
32	99509
33	133661
34	183794
35	249130
36	333956
37	448306
38	605165
39	807053
40	1078093
41	1444021
42	1913418
43	2556415
44	3406636

[1, 1, 2, 2, 4, 6, 9, 12, 22, 32, 45, 70, 98, 153, 231, 318, 452, 685, 933, 1387, 1988, 2769, 3850, 5433, 7622, 10530, 14896, 20635, 28123, 38934, 53067, 72144, 99509, 133661, 183794, 249130, 333956, 448306, 605165, 807053, 1078093, 1444021, 1913418, 2556415, 3406636]

cp's OEIS Frontend

A306730 Expansion of Sum_{k>=0} x^k * Product_{j=1..k} (1 + j*x^j).

Table of values

List of values