A078971 - OEIS

A078971 as a simple table

n	a(n)
1	0
2	1
3	3
4	5
5	11
6	13
7	21
8	43
9	45
10	53
11	85
12	171
13	173
14	181
15	213
16	341
17	683
18	685
19	693
20	725
21	853
22	1365
23	2731
24	2733
25	2741
26	2773
27	2901
28	3413
29	5461
30	10923
31	10925
32	10933
33	10965
34	11093
35	11605
36	13653
37	21845
38	43691
39	43693
40	43701
41	43733
42	43861
43	44373
44	46421
45	54613

[0,1,3,5,11,13,21,43,45,53,85,171,173,181,213,341, 683,685,693,725,853,1365,2731,2733,2741,2773,2901, 3413,5461,10923,10925,10933,10965,11093,11605, 13653,21845,43691,43693,43701,43733,43861,44373, 46421,54613]