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A276399 as a simple table

n a(n)
2 1
3 1
4 2
5 1
6 24
7 5
8 720
9 126
10 4480
11 6048
12 3628800
13 95040
14 479001600
15 55598400
16 5806080
17 1816214400
18 20922789888000
19 40327372800
20 6402373705728000
21 2501955993600
22 8911728967680000
23 193526296104960000
24 1124000727777607680000
25 696294353018880000
26 2256176006302688870400

[1,1,2,1,24,5,720,126,4480,6048,3628800,95040,
 479001600,55598400,5806080,1816214400,
 20922789888000,40327372800,6402373705728000,
 2501955993600,8911728967680000,193526296104960000,
 1124000727777607680000,696294353018880000,
 2256176006302688870400]

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Last modified March 28 17:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)