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A184891 as a simple table

n a(n)
0 1
1 20
2 3850
3 1078000
4 355066250
5 128107903000
6 49001272897500
7 19520507080800000
8 8012558140822125000
9 3365274419145292500000
10 1439327869068441602250000
11 624739666805574817770000000

[1,20,3850,1078000,355066250,128107903000,
 49001272897500,19520507080800000,
 8012558140822125000,3365274419145292500000,
 1439327869068441602250000,
 624739666805574817770000000]

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Last modified May 6 09:25 EDT 2021. Contains 343580 sequences. (Running on oeis4.)