A156221 - OEIS

A156221 as a simple table

n	a(n)
1	3
2	5
3	11
4	13
5	19
6	31
7	41
8	43
9	53
10	59
11	113
12	131
13	139
14	149
15	151
16	191
17	193
18	311
19	349
20	359
21	419
22	431
23	439
24	491
25	541
26	593
27	911
28	941
29	953
30	1153
31	1193
32	1319
33	1439
34	1451
35	1453
36	1459
37	1493
38	1531
39	1543
40	1549
41	1913
42	1931
43	1951
44	3119
45	3191
46	3491
47	3511
48	3541
49	3911
50	4139

[3,5,11,13,19,31,41,43,53,59,113,131,139,149,151, 191,193,311,349,359,419,431,439,491,541,593,911, 941,953,1153,1193,1319,1439,1451,1453,1459,1493, 1531,1543,1549,1913,1931,1951,3119,3191,3491,3511, 3541,3911,4139]