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A017659 as a simple table

na(n)
019487171
13404825447
264339296875
3506623120463
42488651484819
59095120158391
627136050989627
769833729609375
8160578147647843
9337931541778439
10662062621900811
111222791080775407
122149422977421875

[19487171,3404825447,64339296875,506623120463,
 2488651484819,9095120158391,27136050989627,
 69833729609375,160578147647843,337931541778439,
 662062621900811,1222791080775407,2149422977421875]