A291371 - OEIS

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A291371 as a simple table

n	a(n)
1	1
2	4
3	82
4	7258
5	1491629
6	506855279
7	254118439668
8	176377605783906
9	162019808170348933
10	190375587419231088550
11	278587959330563466969926
12	496903413656110608290219603

[1,4,82,7258,1491629,506855279,254118439668, 176377605783906,162019808170348933, 190375587419231088550,278587959330563466969926, 496903413656110608290219603]