A015742 - OEIS

A015742 as a simple table

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

[0,0,0,0,0,0,1,1,1,2,2,3,4,4,5,7,8,10,12,14,18,22, 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]