A391847 - OEIS

A391847 as a simple table

n	a(n)
1	1
2	3
3	15
4	17
5	27
6	31
7	33
8	51
9	63
10	65
11	127
12	129
13	195
14	207
15	219
16	243
17	255
18	257
19	273
20	387
21	403
22	411
23	415
24	435
25	499
26	511
27	513
28	529
29	545
30	771
31	783
32	819
33	831
34	963
35	975
36	1011
37	1023
38	1025
39	1041
40	1057
41	1089
42	1539
43	1551
44	1563
45	1567
46	1615
47	1663
48	1731
49	1743
50	1755
51	1923
52	1939
53	1947
54	1951
55	1987
56	1999
57	2035
58	2047
59	2049
60	2065
61	2081

[1,3,15,17,27,31,33,51,63,65,127,129,195,207,219, 243,255,257,273,387,403,411,415,435,499,511,513, 529,545,771,783,819,831,963,975,1011,1023,1025, 1041,1057,1089,1539,1551,1563,1567,1615,1663,1731, 1743,1755,1923,1939,1947,1951,1987,1999,2035,2047, 2049,2065,2081]