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A250413 as a simple table

na(n)
15
217
338
4125
5335
61061
73069
89495
928221
1086149
11258252
12782393
132350442
147090347
1521303611
1664109181
17192553620
18578665211
191737374865
205217197093
2115659477401
2247004010481
23141055441813
24423295193635
251270118805510

[5,17,38,125,335,1061,3069,9495,28221,86149,
 258252,782393,2350442,7090347,21303611,64109181,
 192553620,578665211,1737374865,5217197093,
 15659477401,47004010481,141055441813,423295193635,
 1270118805510]