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A071605 as a simple table

n a(n)
1 1
2 3
3 18
4 216
5 6840
6 228960
7 15573600
8 994533120
9 85232891520
10 8641918252800
11 1068888956889600
12 155398203460684800
13 26564263279602048000 

[1,3,18,216,6840,228960,15573600,994533120,
 85232891520,8641918252800,1068888956889600,
 155398203460684800,26564263279602048000]

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Last modified April 19 03:05 EDT 2024. Contains 371782 sequences. (Running on oeis4.)