A143088 - OEIS

A143088 as a simple table

n	a(n)
0	1
1	3
2	3
3	7
4	9
5	7
6	15
7	21
8	21
9	15
10	31
11	45
12	49
13	45
14	31
15	63
16	93
17	105
18	105
19	93
20	63
21	127
22	189
23	217
24	225
25	217
26	189
27	127
28	255
29	381
30	441
31	465
32	465
33	441
34	381
35	255
36	511
37	765
38	889
39	945
40	961
41	945
42	889
43	765
44	511
45	1023
46	1533
47	1785
48	1905
49	1953
50	1953
51	1905
52	1785
53	1533
54	1023
55	2047

[1,3,3,7,9,7,15,21,21,15,31,45,49,45,31,63,93,105, 105,93,63,127,189,217,225,217,189,127,255,381,441, 465,465,441,381,255,511,765,889,945,961,945,889, 765,511,1023,1533,1785,1905,1953,1953,1905,1785, 1533,1023,2047]