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A306760 as a simple table

n a(n)
0 1
1 2
2 90
3 705600
4 4105057320000
5 52487876090562232320000
6 3487017405172854771910634342400000000
7 2448893405298238642974553493547144534294528000000000000
8 33257039167768610289435138215602132823918399655132218973388800000000000000000 

[1,2,90,705600,4105057320000,
 52487876090562232320000,
 3487017405172854771910634342400000000,
 24488934052982386429745534935471445342945280000000\
 00000,
 33257039167768610289435138215602132823918399655132\
 218973388800000000000000000]

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Last modified April 16 16:13 EDT 2024. Contains 371749 sequences. (Running on oeis4.)