A243704 - OEIS

A243704 as a simple table

n	a(n)
1	31
2	41
3	61
4	251
5	349
6	379
7	389
8	401
9	419
10	431
11	449
12	461
13	491
14	619
15	631
16	739
17	769
18	811
19	821
20	829
21	1009
22	1061
23	1171
24	1181
25	1229
26	1231
27	1279
28	1289
29	1321
30	1361
31	1451
32	1471
33	1499
34	1601
35	1699
36	1721
37	1759
38	1861
39	2081
40	2131
41	2239
42	2339
43	2341
44	2411
45	2551
46	2579
47	2591
48	2789

[31,41,61,251,349,379,389,401,419,431,449,461,491, 619,631,739,769,811,821,829,1009,1061,1171,1181, 1229,1231,1279,1289,1321,1361,1451,1471,1499,1601, 1699,1721,1759,1861,2081,2131,2239,2339,2341,2411, 2551,2579,2591,2789]