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A003181 as a simple table

n a(n)
0 2
1 2
2 8
3 68
4 3904
5 37329264
6 25626412300941056
7 67516342973185974302549277749387264
8 2871827610052485009904013737758920847602293486924450772201235462734479360 

[2,2,8,68,3904,37329264,25626412300941056,
 67516342973185974302549277749387264,
 28718276100524850099040137377589208476022934869244\
 50772201235462734479360]

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Last modified April 25 09:35 EDT 2024. Contains 371967 sequences. (Running on oeis4.)