A014643 - OEIS

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A014643 as a simple table

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	1
9	2
10	2
11	3
12	3
13	1
14	2
15	2
16	3
17	3
18	4
19	4
20	4
21	5
22	5
23	5
24	1
25	2
26	2
27	3
28	3
29	4
30	4
31	4
32	5
33	5
34	5
35	6
36	6
37	6
38	6
39	7
40	7
41	7
42	7
43	8
44	8
45	8
46	8
47	9
48	9
49	9
50	9
51	9
52	10
53	10
54	10
55	10
56	10
57	11
58	11
59	11
60	11
61	11

[1,1,1,2,1,2,2,1,2,2,3,3,1,2,2,3,3,4,4,4,5,5,5,1, 2,2,3,3,4,4,4,5,5,5,6,6,6,6,7,7,7,7,8,8,8,8,9,9,9, 9,9,10,10,10,10,10,11,11,11,11,11]