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A138473 as a simple table

na(n)
00
121
2987
346368
42178309
5102334155
64807526976
7225851433717
810610209857723
9498454011879264
1023416728348467685
111100087778366101931
1251680708854858323072
132427893228399975082453
14114059301025943970552219
155358359254990966640871840

[0,21,987,46368,2178309,102334155,4807526976,
 225851433717,10610209857723,498454011879264,
 23416728348467685,1100087778366101931,
 51680708854858323072,2427893228399975082453,
 114059301025943970552219,
 5358359254990966640871840]