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A225988 as a simple table

n a(n)
1 9
2 390
3 20160
4 1106424
5 62606544
6 3611217792
7 211096262400
8 12461757863808
9 741242882016000
10 44355068641175040
11 2667095701669969920
12 161021441731743129600
13 9754428938330096713728
14 592621128107578217201664

[9,390,20160,1106424,62606544,3611217792,
 211096262400,12461757863808,741242882016000,
 44355068641175040,2667095701669969920,
 161021441731743129600,9754428938330096713728,
 592621128107578217201664]

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Last modified January 24 07:11 EST 2022. Contains 350534 sequences. (Running on oeis4.)