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A172547 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 7484400
7 807998767676100
8 231528006523766358806400
9 176264656064665625137392456544800
10 343706681395653993021794459883981791479056

[0,0,0,0,1,7484400,807998767676100,
 231528006523766358806400,
 176264656064665625137392456544800,
 343706681395653993021794459883981791479056]

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Last modified March 28 15:28 EDT 2024. Contains 371254 sequences. (Running on oeis4.)