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A033636 as a simple table

n a(n)
1 1
2 21
3 1025310
4 393143628567690
5 4161601591128480023923529880
6 3025979870886810157320547152897281546399520600
7 316069513961213168272637175554794298273860325049869267706740636689200 

[1,21,1025310,393143628567690,
 4161601591128480023923529880,
 3025979870886810157320547152897281546399520600,
 31606951396121316827263717555479429827386032504986\
 9267706740636689200]

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Last modified April 25 06:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)