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A222973 as a simple table

n a(n)
1 1
2 20
3 1884
4 37680
5 1492176
6 26342820
7 810566001
8 14317221700
9 374392387808
10 6675906932160
11 162189676788683
12 2927729818922000
13 67871228115916800
14 1241683361279242560

[1,20,1884,37680,1492176,26342820,810566001,
 14317221700,374392387808,6675906932160,
 162189676788683,2927729818922000,
 67871228115916800,1241683361279242560]

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Last modified October 1 19:48 EDT 2022. Contains 357172 sequences. (Running on oeis4.)