A068710 - OEIS

A068710 as a simple table

n	a(n)
1	2
2	3
3	5
4	7
5	23
6	43
7	67
8	89
9	109
10	809
11	1423
12	2143
13	2341
14	2543
15	4231
16	4253
17	4523
18	4567
19	4657
20	5647
21	5867
22	6547
23	6857
24	10243
25	10289
26	10789
27	10987
28	12043
29	12809
30	18097
31	19087
32	20143
33	20341
34	20431
35	20981
36	21089
37	23041
38	24103
39	25463
40	25643
41	28019
42	28109
43	28901
44	30241
45	32401
46	36457
47	40123
48	40213
49	40231
50	41023

[2,3,5,7,23,43,67,89,109,809,1423,2143,2341,2543, 4231,4253,4523,4567,4657,5647,5867,6547,6857, 10243,10289,10789,10987,12043,12809,18097,19087, 20143,20341,20431,20981,21089,23041,24103,25463, 25643,28019,28109,28901,30241,32401,36457,40123, 40213,40231,41023]