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A207742 as a simple table

na(n)
19
281
3387
41849
510535
660025
7327075
81782225
99840285
1054331641
11298827711
121643572681
139050656627
1449839223009
15274344889595
161510158343225
178313840821405
1845770001214609
19251966391900979
201387088943911449

[9,81,387,1849,10535,60025,327075,1782225,9840285,
 54331641,298827711,1643572681,9050656627,
 49839223009,274344889595,1510158343225,
 8313840821405,45770001214609,251966391900979,
 1387088943911449]