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A275047 as a simple table

n a(n)
0 1
1 18
2 1350
3 141120
4 17151750
5 2272538268
6 318430816704
7 46404203788800
8 6961609406993670
9 1068002895589987500
10 166779781860762170100
11 26422986893371642828800
12 4236593267629481817240000
13 686167053247777413372681600
14 112093956900827388909570240000 

[1,18,1350,141120,17151750,2272538268,
 318430816704,46404203788800,6961609406993670,
 1068002895589987500,166779781860762170100,
 26422986893371642828800,4236593267629481817240000,
 686167053247777413372681600,
 112093956900827388909570240000]

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Last modified June 12 19:14 EDT 2024. Contains 373360 sequences. (Running on oeis4.)