A167424 - OEIS

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A167424 as a simple table

n	a(n)
0	0
1	1
2	5
3	89
4	24305
5	1664474849
6	7382162541380960705
7	139566915517602820239076685726696149889
8	48426946216426731755940416722216940042029155625849753533402166195474237122305

[0,1,5,89,24305,1664474849,7382162541380960705, 139566915517602820239076685726696149889, 48426946216426731755940416722216940042029155625849\ 753533402166195474237122305]