A051059 - OEIS

A051059 as a simple table

n	a(n)
0	1
1	1
2	2
3	2
4	2
5	3
6	4
7	4
8	5
9	6
10	6
11	8
12	10
13	10
14	12
15	14
16	15
17	18
18	20
19	22
20	26
21	30
22	33
23	37
24	42
25	47
26	54
27	62
28	68
29	81
30	93
31	104
32	122
33	142
34	163
35	192
36	225
37	264
38	311
39	371
40	437
41	523
42	623
43	739
44	885
45	1063
46	1266
47	1518
48	1817
49	2175
50	2600
51	3112
52	3711
53	4437
54	5288
55	6296
56	7493
57	8918

[1,1,2,2,2,3,4,4,5,6,6,8,10,10,12,14,15,18,20,22, 26,30,33,37,42,47,54,62,68,81,93,104,122,142,163, 192,225,264,311,371,437,523,623,739,885,1063,1266, 1518,1817,2175,2600,3112,3711,4437,5288,6296,7493, 8918]