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A125947 as a simple table

na(n)
19
281
3729
46513
557369
6495921
74194969
834689393
9280607769
102224214961
1117313344409
12132651929073
131002605145369
147490229758001
1555407572177049
16406450276733553
172960529995462169
1821435301615525041
19154414691892116889
201107604165960750833

[9,81,729,6513,57369,495921,4194969,34689393,
 280607769,2224214961,17313344409,132651929073,
 1002605145369,7490229758001,55407572177049,
 406450276733553,2960529995462169,
 21435301615525041,154414691892116889,
 1107604165960750833]