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A174778 as a simple table

n a(n)
1 0
2 320
3 1311360
4 5373952960
5 22022457918720
6 90248027176961600
7 369836393348730718080
8 1515589449695071305730240
9 6210885195014008862151805440
10 25452206013577958622026792962880 

[0,320,1311360,5373952960,22022457918720,
 90248027176961600,369836393348730718080,
 1515589449695071305730240,
 6210885195014008862151805440,
 25452206013577958622026792962880]

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