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A229841 as a simple table

na(n)
13
215
381
4423
52247
611925
763291
8335943
91783137
109464655
1150237151
12266652213
131415355027
147512519135
1539875467761
16211653760983
171123430446167
185963021689365
1931650938239371
20167999035324503
21891716879181057

[3,15,81,423,2247,11925,63291,335943,1783137,
 9464655,50237151,266652213,1415355027,7512519135,
 39875467761,211653760983,1123430446167,
 5963021689365,31650938239371,167999035324503,
 891716879181057]