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A001500 as a simple table

n a(n)
0 1
1 1
2 4
3 55
4 2008
5 153040
6 20933840
7 4662857360
8 1579060246400
9 772200774683520
10 523853880779443200
11 477360556805016931200
12 569060910292172349004800
13 868071731152923490921728000
14 1663043727673392444887284377600
15 3937477620391471128913917360384000 

[1,1,4,55,2008,153040,20933840,4662857360,
 1579060246400,772200774683520,523853880779443200,
 477360556805016931200,569060910292172349004800,
 868071731152923490921728000,
 1663043727673392444887284377600,
 3937477620391471128913917360384000]

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Last modified May 14 06:13 EDT 2024. Contains 372528 sequences. (Running on oeis4.)