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A057997
as a simple table
n
a(n)
1
1
2
2
3
3
4
16
5
280
6
56448
7
118594560
8
4282251214848
9
3398378138678329344
10
75807214831601328114892800
[1,2,3,16,280,56448,118594560,4282251214848, 3398378138678329344,75807214831601328114892800]
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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)