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A051609 as a simple table

n a(n)
0 1
1 12
2 180
3 3240
4 68040
5 1632960
6 44089920
7 1322697600
8 43649020800
9 1571364748800
10 61283225203200
11 2573895458534400
12 115825295634048000
13 5559614190434304000
14 283540323712149504000
15 15311177480456073216000
16 872737116385996173312000
17 52364226983159770398720000

[1,12,180,3240,68040,1632960,44089920,1322697600,
 43649020800,1571364748800,61283225203200,
 2573895458534400,115825295634048000,
 5559614190434304000,283540323712149504000,
 15311177480456073216000,872737116385996173312000,
 52364226983159770398720000]

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Last modified July 22 08:19 EDT 2024. Contains 374485 sequences. (Running on oeis4.)