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A015001 as a simple table

n a(n)
0 1
1 1
2 4
3 52
4 2080
5 251680
6 91611520
7 100131391360
8 328430963660800
9 3232089113385932800
10 95424198983606279987200
11 8452007576574959037306265600
12 2245867453247498115393020895232000
13 1790317944898228845164815929864036352000 

[1,1,4,52,2080,251680,91611520,100131391360,
 328430963660800,3232089113385932800,
 95424198983606279987200,
 8452007576574959037306265600,
 2245867453247498115393020895232000,
 1790317944898228845164815929864036352000]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)