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A154242 as a simple table

n a(n)
0 1
1 3
2 45
3 1890
4 56700
5 748440
6 10216206000
7 8756748000
8 2841962760000
9 24946749107280000
10 8232427205402400000
11 103279541304139200000
12 3101484625363300176000000
13 1431454442475369312000000

[1,3,45,1890,56700,748440,10216206000,8756748000,
 2841962760000,24946749107280000,
 8232427205402400000,103279541304139200000,
 3101484625363300176000000,
 1431454442475369312000000]

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Last modified January 27 21:01 EST 2022. Contains 350637 sequences. (Running on oeis4.)