A015821 - OEIS

A015821 as a simple table

n	a(n)
1	3
2	7
3	15
4	22
5	23
6	30
7	35
8	44
9	47
10	51
11	56
12	71
13	88
14	95
15	135
16	140
17	153
18	155
19	167
20	207
21	239
22	263
23	280
24	310
25	311
26	368
27	383
28	385
29	395
30	431
31	503
32	506
33	599
34	635
35	646
36	647
37	658
38	719
39	839
40	887
41	911
42	920
43	995
44	1012
45	1023
46	1045
47	1078
48	1080
49	1103
50	1131
51	1185
52	1223
53	1309

[3,7,15,22,23,30,35,44,47,51,56,71,88,95,135,140, 153,155,167,207,239,263,280,310,311,368,383,385, 395,431,503,506,599,635,646,647,658,719,839,887, 911,920,995,1012,1023,1045,1078,1080,1103,1131, 1185,1223,1309]