A009691 - OEIS

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A009691 as a simple table

n	a(n)
1	1
2	5
3	113
4	5781
5	520001
6	72300997
7	14337027825
8	3838128112661
9	1332896717838849
10	582503435362842629
11	312774761747765633777
12	202388665054249928155157
13	155314408487077603685528641

[1,5,113,5781,520001,72300997,14337027825, 3838128112661,1332896717838849,582503435362842629, 312774761747765633777,202388665054249928155157, 155314408487077603685528641]