A004907 - OEIS

A004907 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	1024
15	1025
16	1026
17	1027
18	1028
19	1029
20	1030
21	1031
22	1032
23	1033
24	1034
25	1035
26	2048
27	2049
28	2050
29	2051
30	2052
31	2053
32	2054
33	2055
34	2056
35	2057
36	2058
37	3072
38	3073
39	3074
40	3075
41	3076
42	3077
43	3078
44	3079
45	3080
46	3081
47	4096
48	4097
49	4098

[0,1,2,3,4,5,6,7,8,9,10,11,12,1024,1025,1026,1027, 1028,1029,1030,1031,1032,1033,1034,1035,2048,2049, 2050,2051,2052,2053,2054,2055,2056,2057,2058,3072, 3073,3074,3075,3076,3077,3078,3079,3080,3081,4096, 4097,4098]