A004896 - OEIS

A004896 as a simple table

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	512
15	513
16	514
17	515
18	516
19	517
20	518
21	519
22	520
23	521
24	522
25	523
26	1024
27	1025
28	1026
29	1027
30	1028
31	1029
32	1030
33	1031
34	1032
35	1033
36	1034
37	1536
38	1537
39	1538
40	1539
41	1540
42	1541
43	1542

[0,1,2,3,4,5,6,7,8,9,10,11,12,512,513,514,515,516, 517,518,519,520,521,522,523,1024,1025,1026,1027, 1028,1029,1030,1031,1032,1033,1034,1536,1537,1538, 1539,1540,1541,1542]