A128147 - OEIS

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A128147 as a simple table

n	a(n)
1	1
2	3
3	7425
4	47324536875
5	25638858602403023525625
6	12884448481414473203775367576406984041875
7	115708032002378912987246508786002888051981871843289603877158640625

[1,3,7425,47324536875,25638858602403023525625, 12884448481414473203775367576406984041875, 11570803200237891298724650878600288805198187184328\ 9603877158640625]