A017851 - OEIS

A017851 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	0
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	2
14	3
15	4
16	5
17	6
18	6
19	7
20	9
21	12
22	16
23	21
24	26
25	31
26	37
27	45
28	56
29	71
30	91
31	115
32	143
33	176
34	216
35	266
36	331
37	415
38	521
39	652
40	812
41	1007
42	1247
43	1547
44	1925
45	2401
46	2997
47	3738
48	4654
49	5786
50	7190

[1,0,0,0,0,0,1,1,1,1,1,1,1,2,3,4,5,6,6,7,9,12,16, 21,26,31,37,45,56,71,91,115,143,176,216,266,331, 415,521,652,812,1007,1247,1547,1925,2401,2997, 3738,4654,5786,7190]