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A171432 as a simple table

na(n)
12
23
35
423
553
6137
7480881
8480941
9480989
10481001
11481469
123524099
133524113
143524281
153524309
1670117933
17189961799
18189961907
19189961997
20189962177
21189962609
22189963941
23189963959
24189968729
25514274867
26514282961
273779851157
2810246935913
2910246936309
3010246936463

[2,3,5,23,53,137,480881,480941,480989,481001,
 481469,3524099,3524113,3524281,3524309,70117933,
 189961799,189961907,189961997,189962177,189962609,
 189963941,189963959,189968729,514274867,514282961,
 3779851157,10246935913,10246936309,10246936463]