A068221 - OEIS

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A068221 as a simple table

n	a(n)
1	1
2	3
3	27
4	6939
5	1819024155
6	4000076419257644882715
7	77372730618755190082837640023742562619343248155
8	237146729315719909074685533605289611245100501015339264129426202250460094330698830235303562543675218715

[1,3,27,6939,1819024155,4000076419257644882715, 77372730618755190082837640023742562619343248155, 23714672931571990907468553360528961124510050101533\ 92641294262022504600943306988302353035625436752187\ 15]