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A017097 as a simple table

na(n)
0512
11000000000
2198359290368
35429503678976
460716992766464
5406671383849472
61953125000000000
77427658739644928
823762680013799936
966540410775079424
10167619550409708032
11387420489000000000
12833747762130149888
131689478959002692096
143251948521156637184
155987402799531080192

[512,1000000000,198359290368,5429503678976,
 60716992766464,406671383849472,1953125000000000,
 7427658739644928,23762680013799936,
 66540410775079424,167619550409708032,
 387420489000000000,833747762130149888,
 1689478959002692096,3251948521156637184,
 5987402799531080192]