A025040 - OEIS

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A025040 as a simple table

n	a(n)
0	1
1	1
2	6435
3	1577585295
4	4148378852099625
5	63805953776276649848625
6	4012852078114749147678149338875
7	814318942973348333484015877548157809375
8	450538787986875167583433232345723106006796340625

[1,1,6435,1577585295,4148378852099625, 63805953776276649848625, 4012852078114749147678149338875, 814318942973348333484015877548157809375, 450538787986875167583433232345723106006796340625]