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A139207 as a simple table

na(n)
15
22
32947253997913233984847871999999
429
523
619
7719
84989599
939520825343999
1011
1111058645491711999
12419
13479001599
14359
157
16860234568201646565394748723848806399999999

[5,2,2947253997913233984847871999999,29,23,19,719,
 4989599,39520825343999,11,11058645491711999,419,
 479001599,359,7,
 860234568201646565394748723848806399999999]