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A231399 as a simple table

na(n)
17
215
3100
4311
51706
67844
735696
8184692
9873979
104399412
1122162876
12110261498
13564140421
142850848402
1514542997263
1674409026027
17380043653506
181950717998012
1910003505335070
2051373261673575
21264098740804503
221357567141208027

[7,15,100,311,1706,7844,35696,184692,873979,
 4399412,22162876,110261498,564140421,2850848402,
 14542997263,74409026027,380043653506,
 1950717998012,10003505335070,51373261673575,
 264098740804503,1357567141208027]