A161281 - OEIS

A161281 as a simple table

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	2
7	1
8	2
9	2
10	3
11	3
12	5
13	4
14	5
15	7
16	8
17	7
18	10
19	10
20	14
21	14
22	15
23	17
24	23
25	23
26	27
27	30
28	36
29	36
30	46
31	48
32	56
33	61
34	68
35	76
36	90
37	91
38	105
39	116
40	134
41	140
42	159
43	172
44	196
45	214
46	235
47	254
48	292
49	306
50	345
51	376
52	418
53	446
54	500
55	541
56	601
57	643
58	710
59	766
60	860
61	910
62	999
63	1088
64	1194
65	1282
66	1409

[0,0,1,1,1,2,1,2,2,3,3,5,4,5,7,8,7,10,10,14,14,15, 17,23,23,27,30,36,36,46,48,56,61,68,76,90,91,105, 116,134,140,159,172,196,214,235,254,292,306,345, 376,418,446,500,541,601,643,710,766,860,910,999, 1088,1194,1282,1409]