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A338693 as a simple table

na(n)
11
24
327
4257
53125
646665
7823543
816777312
9387420490
1010000001250
11285311670611
128916100467712
13302875106592253
1411112006825910963
15437893890380859625
1618446744073716891649
17827240261886336764177
1839346408075296709766628
191978419655660313589123979

[1,4,27,257,3125,46665,823543,16777312,387420490,
 10000001250,285311670611,8916100467712,
 302875106592253,11112006825910963,
 437893890380859625,18446744073716891649,
 827240261886336764177,39346408075296709766628,
 1978419655660313589123979]