A157193 - OEIS

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A157193 as a simple table

n	a(n)
0	1
1	4
2	44
3	1953
4	4179942
5	42836179578838
6	3958573977160882295479936105
7	36328295343356352083453782833218820307659379901717630389

[1,4,44,1953,4179942,42836179578838, 3958573977160882295479936105, 36328295343356352083453782833218820307659379901717\ 630389]