A048398 - OEIS

A048398 as a simple table

n	a(n)
1	2
2	3
3	5
4	7
5	23
6	43
7	67
8	89
9	101
10	787
11	4567
12	12101
13	12323
14	12343
15	32321
16	32323
17	34543
18	54323
19	56543
20	56767
21	76543
22	78787
23	78989
24	210101
25	212123
26	234323
27	234343
28	432121
29	432323
30	432343
31	434323
32	454543
33	456767
34	654323
35	654343
36	678767
37	678989

[2,3,5,7,23,43,67,89,101,787,4567,12101,12323, 12343,32321,32323,34543,54323,56543,56767,76543, 78787,78989,210101,212123,234323,234343,432121, 432323,432343,434323,454543,456767,654323,654343, 678767,678989]