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A171212 as a simple table

na(n)
01
12
216
3320
412928
5985088
6140861440
738451150848
820403322617856
921307854867660800
1044110759073910095872
11181739941085108158595072
121493546441998961207249207296
1324512116566896662943648857456640

[1,2,16,320,12928,985088,140861440,38451150848,
 20403322617856,21307854867660800,
 44110759073910095872,181739941085108158595072,
 1493546441998961207249207296,
 24512116566896662943648857456640]