A178576 - OEIS

A178576 as a simple table

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	23
8	29
9	37
10	47
11	89
12	97
13	149
14	157
15	199
16	233
17	241
18	379
19	521
20	613
21	631
22	1021
23	1597
24	1741
25	2207
26	3571
27	9349
28	10949
29	11933
30	17713
31	28657
32	46381
33	46457
34	46601
35	50549
36	75169
37	196439
38	203183
39	214129
40	514229
41	560597
42	832129
43	2178343

[2,3,5,7,11,13,23,29,37,47,89,97,149,157,199,233, 241,379,521,613,631,1021,1597,1741,2207,3571,9349, 10949,11933,17713,28657,46381,46457,46601,50549, 75169,196439,203183,214129,514229,560597,832129, 2178343]