A203347 - OEIS

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A203347 as a simple table

n	a(n)
1	80
2	998
3	17676
4	505798
5	23451600
6	1749952542
7	207766349392
8	39642112566362
9	12152648421141966
10	5965344860666094878

[80,998,17676,505798,23451600,1749952542, 207766349392,39642112566362,12152648421141966, 5965344860666094878]