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A230645 as a simple table

na(n)
15
221
3142
4840
54282
618460
7116615
8703919
93657355
1016159899
1195479298
12588467880
133115779158
1414092223060
1577925646825
16490757504161
172647731283685
1812245345216181
1963384393297262
20408260456356200
212244457157941402
2210605018345084220

[5,21,142,840,4282,18460,116615,703919,3657355,
 16159899,95479298,588467880,3115779158,
 14092223060,77925646825,490757504161,
 2647731283685,12245345216181,63384393297262,
 408260456356200,2244457157941402,
 10605018345084220]