A154530 - OEIS

A154530 as a simple table

n	a(n)
1	23
2	43
3	67
4	89
5	109
6	1213
7	2221
8	2423
9	3433
10	3637
11	4241
12	4243
13	5051
14	5657
15	5857
16	6263
17	6869
18	7069
19	7877
20	7879
21	8081
22	8887
23	9091
24	9293
25	9697
26	10099
27	102101
28	102103
29	108107
30	108109
31	112111
32	114113
33	120121
34	124123
35	126127
36	138139
37	148147
38	150151

[23,43,67,89,109,1213,2221,2423,3433,3637,4241, 4243,5051,5657,5857,6263,6869,7069,7877,7879,8081, 8887,9091,9293,9697,10099,102101,102103,108107, 108109,112111,114113,120121,124123,126127,138139, 148147,150151]