A273397 - OEIS

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A273397 as a simple table

n	a(n)
0	1
1	1
2	1
3	5
4	377
5	267914296
6	1725375039079340637797070384
7	202401005213503038261932567177107618332887918916819829782797456368284639448671475316218754

[1,1,1,5,377,267914296, 1725375039079340637797070384, 20240100521350303826193256717710761833288791891681\ 9829782797456368284639448671475316218754]