A158026 - OEIS

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A158026 as a simple table

n	a(n)
1	0
2	2
3	13
4	1597
5	1134903170
6	3416454622906707
7	10284720757613717413913
8	394810887814999156320699623170776339

[0,2,13,1597,1134903170,3416454622906707, 10284720757613717413913, 394810887814999156320699623170776339]