A009490 - OEIS

A009490 as a simple table

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	6
6	6
7	9
8	11
9	14
10	16
11	20
12	23
13	27
14	31
15	35
16	43
17	47
18	55
19	61
20	70
21	78
22	88
23	98
24	111
25	123
26	136
27	152
28	168
29	187
30	204
31	225
32	248
33	271
34	296
35	325
36	356
37	387
38	418
39	455
40	495
41	537
42	581
43	629
44	678
45	732
46	787
47	851
48	918
49	986
50	1056
51	1133
52	1217
53	1307
54	1399
55	1498
56	1600
57	1708
58	1823

[1,1,2,3,4,6,6,9,11,14,16,20,23,27,31,35,43,47,55, 61,70,78,88,98,111,123,136,152,168,187,204,225, 248,271,296,325,356,387,418,455,495,537,581,629, 678,732,787,851,918,986,1056,1133,1217,1307,1399, 1498,1600,1708,1823]