A058740 - OEIS

A058740 as a simple table

n	a(n)
-1	1
0	0
1	1
2	1
3	1
4	2
5	2
6	3
7	3
8	3
9	4
10	6
11	7
12	8
13	9
14	10
15	12
16	14
17	17
18	19
19	21
20	24
21	29
22	33
23	38
24	43
25	48
26	54
27	61
28	70
29	79
30	88
31	98
32	111
33	124
34	140
35	157
36	174
37	193
38	214
39	239
40	266
41	295
42	326
43	361
44	398
45	441
46	488
47	538
48	592
49	650
50	715
51	786
52	864
53	948
54	1041
55	1138
56	1246
57	1364
58	1492

[1,0,1,1,1,2,2,3,3,3,4,6,7,8,9,10,12,14,17,19,21, 24,29,33,38,43,48,54,61,70,79,88,98,111,124,140, 157,174,193,214,239,266,295,326,361,398,441,488, 538,592,650,715,786,864,948,1041,1138,1246,1364, 1492]