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A187748 as a simple table

n a(n)
1 1
2 2
3 12
4 144
5 4320
6 233280
7 29393280
8 7054387200
9 3555411148800
10 3519857037312000
11 7201627498340352000
12 28950542543328215040000
13 237104943429858081177600000
14 3853903750508913251460710400000
15 126138269754156730720309051392000000
16 8234306249551351381421774874869760000000
17 1079270520128695625562952032849179443200000000
18 282311265573183686952254740944556962034483200000000

[1,2,12,144,4320,233280,29393280,7054387200,
 3555411148800,3519857037312000,
 7201627498340352000,28950542543328215040000,
 237104943429858081177600000,
 3853903750508913251460710400000,
 126138269754156730720309051392000000,
 8234306249551351381421774874869760000000,
 1079270520128695625562952032849179443200000000,
 28231126557318368695225474094455696203448320000000\
 0]

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Last modified August 15 06:41 EDT 2024. Contains 375172 sequences. (Running on oeis4.)