A017843 - OEIS

A017843 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	3
12	4
13	4
14	5
15	7
16	10
17	14
18	17
19	21
20	27
21	36
22	49
23	64
24	82
25	105
26	137
27	181
28	238
29	310
30	401
31	521
32	681
33	892
34	1166
35	1518
36	1975
37	2574
38	3361
39	4390
40	5727
41	7464
42	9728
43	12688
44	16557
45	21603
46	28175

[1,0,0,0,0,1,1,1,1,1,2,3,4,4,5,7,10,14,17,21,27, 36,49,64,82,105,137,181,238,310,401,521,681,892, 1166,1518,1975,2574,3361,4390,5727,7464,9728, 12688,16557,21603,28175]