A336389 - OEIS

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A336389 as a simple table

n	a(n)
0	1
1	6
2	120
3	19399380
4	195534950863140268380
5	538938984694949877040715541221415046162838700
6	216487559804430601784907786655491617909711008142914104790481010259258659171900

[1,6,120,19399380,195534950863140268380, 538938984694949877040715541221415046162838700, 21648755980443060178490778665549161790971100814291\ 4104790481010259258659171900]