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A098922 as a simple table

na(n)
12
23
35
47
511
631
771
873
997
10101
11701
12941
13971
14991
159001
169601
179721
189931
199941
209967
2170001
2290001
2393001
2496001
2597001
2699401
2799611
2899721
2999881
3099923
3199989
32940001
33972001
34973001
35996001
36997001
37999101
38999331
39999431
40999631
41999931

[2,3,5,7,11,31,71,73,97,101,701,941,971,991,9001,
 9601,9721,9931,9941,9967,70001,90001,93001,96001,
 97001,99401,99611,99721,99881,99923,99989,940001,
 972001,973001,996001,997001,999101,999331,999431,
 999631,999931]