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A173223 as a simple table

n a(n)
0 0
1 12
2 90
3 4320
4 418950
5 68045040
6 16408798560
7 5461729378560
8 2388307104414000
9 1323740028257460000
10 905000067758493495360
11 747005694270473162004480
12 731648558087385682524580800 

[0,12,90,4320,418950,68045040,16408798560,
 5461729378560,2388307104414000,
 1323740028257460000,905000067758493495360,
 747005694270473162004480,
 731648558087385682524580800]

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Last modified September 16 15:31 EDT 2024. Contains 375976 sequences. (Running on oeis4.)