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A221687 as a simple table

na(n)
13
235
3396
44429
549387
6550264
76129659
868277335
9760519092
108471140593
1194356794511
121051003927840
1311706726309807
14130396694392883
151452438312980628
1616178148223958949
17180202131485051219

[3,35,396,4429,49387,550264,6129659,68277335,
 760519092,8471140593,94356794511,1051003927840,
 11706726309807,130396694392883,1452438312980628,
 16178148223958949,180202131485051219]