A309173 - cp's OEIS frontend

A309173 Expansion of Product_{k>=1} (1 + (1 + x + x^2) * x^k).

n	a(n)
0	1
1	1
2	2
3	4
4	6
5	10
6	15
7	23
8	34
9	50
10	71
11	100
12	140
13	195
14	268
15	363
16	487
17	650
18	865
19	1145
20	1505
21	1962
22	2541
23	3275
24	4208
25	5390
26	6879
27	8740
28	11053
29	13917
30	17459
31	21837
32	27244
33	33906
34	42085
35	52085
36	64268
37	79071
38	97025
39	118772
40	145082
41	176869
42	215204
43	261333
44	316705
45	383019

[1, 1, 2, 4, 6, 10, 15, 23, 34, 50, 71, 100, 140, 195, 268, 363, 487, 650, 865, 1145, 1505, 1962, 2541, 3275, 4208, 5390, 6879, 8740, 11053, 13917, 17459, 21837, 27244, 33906, 42085, 52085, 64268, 79071, 97025, 118772, 145082, 176869, 215204, 261333, 316705, 383019]

cp's OEIS Frontend

A309173 Expansion of Product_{k>=1} (1 + (1 + x + x^2) * x^k).

Table of values

List of values