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A135948 as a simple table

na(n)
12
23
35
47
517
623
737
841
943
1047
1153
1259
1361
1467
1571
1673
1779
1889
1997
20241
21479
22571
23673
24853

[2,3,5,7,17,23,37,41,43,47,53,59,61,67,71,73,79,
 89,97,241,479,571,673,853]