A015754 - OEIS

A015754 as a simple table

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	3
6	4
7	4
8	5
9	7
10	8
11	10
12	12
13	14
14	18
15	22
16	25
17	30
18	36
19	42
20	50
21	58
22	67
23	79
24	92
25	106
26	123
27	142
28	164
29	189
30	217
31	248
32	284
33	325
34	370
35	421
36	479
37	543
38	616
39	698
40	788
41	890
42	1005
43	1131
44	1273
45	1432
46	1606
47	1802
48	2020
49	2259
50	2527
51	2824
52	3150
53	3514
54	3916
55	4358
56	4849

[1,1,1,2,2,3,4,4,5,7,8,10,12,14,18,22,25,30,36,42, 50,58,67,79,92,106,123,142,164,189,217,248,284, 325,370,421,479,543,616,698,788,890,1005,1131, 1273,1432,1606,1802,2020,2259,2527,2824,3150,3514, 3916,4358,4849]