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A017492 as a simple table

na(n)
016777216
116983563041
2656100000000
37984925229121
453459728531456
5248155780267521
6899194740203776
72724905250390625
87213895789838336
917181861798319201
1037588592026706176
1176686282021340161
12147578905600000000
13270281038127131201
14474373168346071296

[16777216,16983563041,656100000000,7984925229121,
 53459728531456,248155780267521,899194740203776,
 2724905250390625,7213895789838336,
 17181861798319201,37588592026706176,
 76686282021340161,147578905600000000,
 270281038127131201,474373168346071296]