A286409 - OEIS

A286409 as a simple table

n	a(n)
0	1
1	1
2	2
3	2
4	6
5	6
6	14
7	14
8	30
9	28
10	60
11	60
12	124
13	126
14	252
15	254
16	508
17	510
18	1020
19	1020
20	2046
21	2044
22	4092
23	4094
24	8190
25	8190
26	16382
27	16382
28	32766
29	32766
30	65534
31	65534
32	131070
33	131070
34	262142
35	262142
36	524286
37	518142
38	1047550
39	1032702
40	2081278
41	2095102
42	4178430

[1,1,2,2,6,6,14,14,30,28,60,60,124,126,252,254, 508,510,1020,1020,2046,2044,4092,4094,8190,8190, 16382,16382,32766,32766,65534,65534,131070,131070, 262142,262142,524286,518142,1047550,1032702, 2081278,2095102,4178430]