A028768 - OEIS

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A028768 as a simple table

n	a(n)
1	2
2	3
3	6
4	7
5	8
6	10
7	12
8	13
9	17
10	18
11	19
12	21
13	22
14	23
15	24
16	27
17	28
18	29
19	30
20	32
21	33
22	35
23	37
24	38
25	39
26	40
27	41
28	42
29	43
30	46
31	47
32	48
33	50
34	51
35	52
36	53
37	54

[2,3,6,7,8,10,12,13,17,18,19,21,22,23,24,27,28,29, 30,32,33,35,37,38,39,40,41,42,43,46,47,48,50,51, 52,53,54]