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A262474 as a simple table

na(n)
17
217
3115
4457
53055
616081
7107731
8655001
94427407
1028848817
11196901395
121326556777
139126593455
1462528586641
15432702173011
162991144099001
1720781922758607
18144379920476017
191005798678435475
207008103279484297

[7,17,115,457,3055,16081,107731,655001,4427407,
 28848817,196901395,1326556777,9126593455,
 62528586641,432702173011,2991144099001,
 20781922758607,144379920476017,1005798678435475,
 7008103279484297]