A140423 - OEIS

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A140423 as a simple table

n	a(n)
1	1
2	5
3	26
4	354
5	72379
6	4338080215
7	18448597098193762724
8	340282370354622283774333836315916425060
9	115792089237316207213755562747271079374483128445080168204415615259394085515413

[1,5,26,354,72379,4338080215,18448597098193762724, 340282370354622283774333836315916425060, 11579208923731620721375556274727107937448312844508\ 0168204415615259394085515413]