A181034 - OEIS

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A181034 as a simple table

n	a(n)
1	1
2	8
3	99
4	2999
5	200798
6	30584687
7	10496827403
8	8147000813446
9	14279081380626859
10	56548869471250924613
11	505895767712482884973116
12	10224865987802162338842130221
13	466867871514396686081152537710131

[1,8,99,2999,200798,30584687,10496827403, 8147000813446,14279081380626859, 56548869471250924613,505895767712482884973116, 10224865987802162338842130221, 466867871514396686081152537710131]