A290624 - OEIS

A290624 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	9
9	9
10	9
11	9
12	9
13	9
14	11
15	11
16	43
17	43
18	43
19	43
20	59
21	59
22	59
23	447
24	1471
25	1471
26	1471
27	1535
28	7679
29	7679
30	7679
31	7679
32	65023
33	65535
34	65535
35	65535
36	65535
37	65535
38	65535
39	65535
40	65535
41	131071
42	524287
43	524287
44	2097151
45	2097151
46	2097151
47	2097151

[1,1,1,1,1,1,1,1,9,9,9,9,9,9,11,11,43,43,43,43,59, 59,59,447,1471,1471,1471,1535,7679,7679,7679,7679, 65023,65535,65535,65535,65535,65535,65535,65535, 65535,131071,524287,524287,2097151,2097151, 2097151,2097151]