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A177290 as a simple table

n a(n)
0 1
1 1
2 6
3 90
4 2520
5 113400
6 7484400
7 681080400
8 81729648000
9 12504636144000
10 2375880867360000
11 367786358267328000
12 47683626117839712000 

[1,1,6,90,2520,113400,7484400,681080400,
 81729648000,12504636144000,2375880867360000,
 367786358267328000,47683626117839712000]

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Last modified April 16 16:32 EDT 2024. Contains 371749 sequences. (Running on oeis4.)