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A177615 as a simple table

n a(n)
0 1
1 1
2 20
3 1680
4 369600
5 168168000
6 137127810959
7 182138398520387
8 367988956112888200
9 1074073326771101149080
10 4350318942513425384777400
11 23673963203663687592089088600
12 168569155472096397352266896207243
13 1536148007688582239667327040442799059 

[1,1,20,1680,369600,168168000,137127810959,
 182138398520387,367988956112888200,
 1074073326771101149080,4350318942513425384777400,
 23673963203663687592089088600,
 168569155472096397352266896207243,
 1536148007688582239667327040442799059]

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Last modified September 18 18:09 EDT 2024. Contains 376002 sequences. (Running on oeis4.)