A203585 - OEIS

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A203585 as a simple table

n	a(n)
1	1
2	13
3	6500
4	262769000
5	1500305882400000
6	1885591784499143760000000
7	753074404854223679800035840000000000
8	130639388303516205847055577677763494400000000000000

[1,13,6500,262769000,1500305882400000, 1885591784499143760000000, 753074404854223679800035840000000000, 13063938830351620584705557767776349440000000000000\ 0]