A117789 - OEIS

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A117789 as a simple table

n	a(n)
1	1
2	3
3	4
4	7
5	18
6	322
7	5778
8	505019158607
9	84722519070079276
10	1473646213395791149646646123
11	105249261265075663875711417309855979021650214636

[1,3,4,7,18,322,5778,505019158607, 84722519070079276,1473646213395791149646646123, 105249261265075663875711417309855979021650214636]