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A231447 as a simple table

na(n)
17
287
31598
433659
5738459
616471575
7370059818
88337875579
9188061528227
104243377409271
1195760169469137
122161131575055099
1348773753581494548
141100764446612026879
1524842987212570658866
16560678221584425051945

[7,87,1598,33659,738459,16471575,370059818,
 8337875579,188061528227,4243377409271,
 95760169469137,2161131575055099,48773753581494548,
 1100764446612026879,24842987212570658866,
 560678221584425051945]