A070227 - OEIS

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A070227 as a simple table

n	a(n)
0	1
1	1
2	7
3	2971
4	326922081
5	25571928251231076
6	3104750712141723393459934903
7	1106411839720559249283387766293758050197271
8	1982711933502621451047063899803427489760228712955842831202561

[1,1,7,2971,326922081,25571928251231076, 3104750712141723393459934903, 1106411839720559249283387766293758050197271, 19827119335026214510470638998034274897602287129558\ 42831202561]