A006280 - OEIS

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A006280 as a simple table

n	a(n)
0	0
1	1
2	1
3	1
4	4
5	9
6	196
7	16641
8	639988804
9	177227652025317609
10	72589906463585427805281295977816196
11	2280022876287160141646375873338796324543839666085098409289740769448641

[0,1,1,1,4,9,196,16641,639988804, 177227652025317609, 72589906463585427805281295977816196, 22800228762871601416463758733387963245438396660850\ 98409289740769448641]