A028769 - OEIS

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A028769 as a simple table

n	a(n)
1	2
2	3
3	5
4	6
5	7
6	10
7	11
8	12
9	13
10	14
11	15
12	17
13	18
14	19
15	20
16	21
17	22
18	23
19	24
20	26
21	27
22	29
23	30
24	31
25	33
26	34
27	35
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	45
36	46
37	47
38	48
39	50
40	51
41	52
42	53
43	54
44	55

[2,3,5,6,7,10,11,12,13,14,15,17,18,19,20,21,22,23, 24,26,27,29,30,31,33,34,35,37,38,39,40,41,42,43, 45,46,47,48,50,51,52,53,54,55]