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A083957 as a simple table

n a(n)
1 1
2 252
3 8864856
4 40638618022744
5 23098236228791472696480
6 1568841035670687222903484318855680
7 12397389650957442295025809189993580551236444160 

[1,252,8864856,40638618022744,
 23098236228791472696480,
 1568841035670687222903484318855680,
 12397389650957442295025809189993580551236444160]

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Last modified April 16 10:29 EDT 2024. Contains 371709 sequences. (Running on oeis4.)