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A086502 as a simple table

n a(n)
1 0
2 1
3 18
4 360
5 7560
6 289440
7 9828000
8 631169280
9 46449002880
10 4526271187200
11 524461965350400
12 74044329341875200
13 12211524764030592000

[0,1,18,360,7560,289440,9828000,631169280,
 46449002880,4526271187200,524461965350400,
 74044329341875200,12211524764030592000]

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)