A080491 - OEIS

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A080491 as a simple table

n	a(n)
1	6
2	36
3	396
4	30096
5	3009600
6	300960000
7	30096000000
8	3009600000000
9	300960000000000
10	30096000000000000
11	3009600000000000000
12	300960000000000000000
13	30096000000000000000000

[6,36,396,30096,3009600,300960000,30096000000, 3009600000000,300960000000000,30096000000000000, 3009600000000000000,300960000000000000000, 30096000000000000000000]