A089969 - OEIS

A089969 as a simple table

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	9
7	11
8	13
9	19
10	23
11	43
12	47
13	59
14	61
15	97
16	137
17	139
18	157
19	277
20	281
21	283
22	311
23	313
24	317
25	421
26	431
27	619
28	673
29	821
30	823
31	827
32	829
33	947
34	997
35	1151
36	1663
37	1993
38	1997
39	2383
40	3359
41	6229
42	11437
43	11443
44	11447
45	12899
46	12911
47	12917
48	12919
49	12923
50	18367

[1,2,4,5,6,9,11,13,19,23,43,47,59,61,97,137,139, 157,277,281,283,311,313,317,421,431,619,673,821, 823,827,829,947,997,1151,1663,1993,1997,2383,3359, 6229,11437,11443,11447,12899,12911,12917,12919, 12923,18367]