A235468 - OEIS

A235468 as a simple table

n	a(n)
1	2
2	5
3	7
4	11
5	31
6	37
7	127
8	131
9	151
10	157
11	257
12	281
13	311
14	661
15	677
16	751
17	757
18	877
19	881
20	907
21	911
22	1277
23	1301
24	1381
25	1511
26	1531
27	3137
28	3187
29	3251
30	3307
31	3407
32	3761
33	3877
34	3911
35	3931
36	4001
37	4007
38	4027
39	4051
40	4057
41	4561
42	4637
43	6257
44	6287
45	7057
46	7151
47	7177
48	7187
49	7507

[2,5,7,11,31,37,127,131,151,157,257,281,311,661, 677,751,757,877,881,907,911,1277,1301,1381,1511, 1531,3137,3187,3251,3307,3407,3761,3877,3911,3931, 4001,4007,4027,4051,4057,4561,4637,6257,6287,7057, 7151,7177,7187,7507]