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A198959 as a simple table

na(n)
12
23
37
446
52112
64460539
719896408170515
8395867058087736049315365218
9156710727679038987453730700439845485538142584724187516

[2,3,7,46,2112,4460539,19896408170515,
 395867058087736049315365218,
 15671072767903898745373070043984548553814258472418\
 7516]