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A201955 as a simple table

na(n)
17
2231
31587
417903
5194633
62232183
725952953
8305979795
93640250461
1043624267941
11525774918227
126366440653727
1377388201173481
14943784967491137
1511542145313593503
16141498452574240619
171738344524754583621

[7,231,1587,17903,194633,2232183,25952953,
 305979795,3640250461,43624267941,525774918227,
 6366440653727,77388201173481,943784967491137,
 11542145313593503,141498452574240619,
 1738344524754583621]