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A008994 as a simple table

n a(n)
0 1
1 18
2 3240
3 1224720
4 62985600
5 87298041600
6 857965152844800
7 1575854362368000
8 14540529421135872000
9 20363866049006577377280000
10 5760064968147574743859200000
11 2384666896813095943957708800000 

[1,18,3240,1224720,62985600,87298041600,
 857965152844800,1575854362368000,
 14540529421135872000,20363866049006577377280000,
 5760064968147574743859200000,
 2384666896813095943957708800000]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)