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A172723 as a simple table

n a(n)
1 0
2 3
3 87
4 8515
5 1992760
6 971853075
7 887226868605
8 1397573379100570
9 3564687080800036800
10 13994422270858878448950
11 81142871841524279822631750
12 671520101271652710399345719850
13 7707138964962257026620598104320400 

[0,3,87,8515,1992760,971853075,887226868605,
 1397573379100570,3564687080800036800,
 13994422270858878448950,
 81142871841524279822631750,
 671520101271652710399345719850,
 7707138964962257026620598104320400]

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Last modified April 19 10:31 EDT 2024. Contains 371791 sequences. (Running on oeis4.)