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A181535 as a simple table

na(n)
01
11
23
315
4145
52489
683021
75402565
8697174827
9179186086779
1091923934089991
1194222398574777359
12193061880430280639843
13790974713509247761511635
146480456214858268755580705051
15106182276664343738404944887223883

[1,1,3,15,145,2489,83021,5402565,697174827,
 179186086779,91923934089991,94222398574777359,
 193061880430280639843,790974713509247761511635,
 6480456214858268755580705051,
 106182276664343738404944887223883]