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A276017 as a simple table

n a(n)
0 1
1 18
2 2160
3 423360
4 99792000
5 25499650176
6 6797581959168
7 1860535606026240
8 518890571236477440
9 146835076503772800000
10 42046646730013562757120
11 12160617341681775057960960
12 3547136319516173918512742400
13 1042325945372157283978798694400
14 308269259704090665806809006080000

[1,18,2160,423360,99792000,25499650176,
 6797581959168,1860535606026240,518890571236477440,
 146835076503772800000,42046646730013562757120,
 12160617341681775057960960,
 3547136319516173918512742400,
 1042325945372157283978798694400,
 308269259704090665806809006080000]

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Last modified September 16 18:48 EDT 2024. Contains 375977 sequences. (Running on oeis4.)