A141947 - OEIS

A141947 as a simple table

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	3
7	3
8	0
9	1
10	7
11	7
12	1
13	0
14	4
15	15
16	15
17	4
18	0
19	1
20	11
21	31
22	31
23	11
24	1
25	0
26	5
27	26
28	63
29	63
30	26
31	5
32	0
33	1
34	16
35	57
36	127
37	127
38	57
39	16
40	1
41	0
42	6
43	42
44	120
45	255
46	255
47	120
48	42
49	6
50	0
51	1
52	22
53	99
54	247
55	511
56	511
57	247
58	99
59	22
60	1
61	0
62	7
63	64
64	219
65	502
66	1023
67	1023
68	502
69	219
70	64
71	7
72	0

[0,0,1,1,0,3,3,0,1,7,7,1,0,4,15,15,4,0,1,11,31,31, 11,1,0,5,26,63,63,26,5,0,1,16,57,127,127,57,16,1, 0,6,42,120,255,255,120,42,6,0,1,22,99,247,511,511, 247,99,22,1,0,7,64,219,502,1023,1023,502,219,64,7, 0]