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A219214 as a simple table

na(n)
115
221
3345
42391
519307
6131724
7854611
85244065
931109196
10177926081
11979705264
125192348891
1326557163019
14131502649555
15632166025952
162956537440503
1713474531366615
1859932391653310
19260511358279859
201108055431000178

[15,21,345,2391,19307,131724,854611,5244065,
 31109196,177926081,979705264,5192348891,
 26557163019,131502649555,632166025952,
 2956537440503,13474531366615,59932391653310,
 260511358279859,1108055431000178]