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A227052 as a simple table

n a(n)
0 1
1 1
2 12
3 504
4 43680
5 6375600
6 1402410240
7 432938943360
8 178462987637760
9 94670977328928000
10 62815650955529472000
11 50963773003971232204800
12 49633807532904958383820800
13 57141374006987657125324185600
14 76763145767753986733306290176000
15 119005648371962652004288345681920000

[1,1,12,504,43680,6375600,1402410240,432938943360,
 178462987637760,94670977328928000,
 62815650955529472000,50963773003971232204800,
 49633807532904958383820800,
 57141374006987657125324185600,
 76763145767753986733306290176000,
 119005648371962652004288345681920000]

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Last modified December 2 20:59 EST 2022. Contains 358510 sequences. (Running on oeis4.)