A080834 - OEIS

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A080834 as a simple table

n	a(n)
0	1
1	2
2	9
3	58
4	485
5	4986
6	60517
7	846434
8	13384233
9	235915570
10	4583337761
11	97257637962
12	2237249019469
13	55438067438378
14	1471848284860605
15	41673308546595826
16	1253228243522934737
17	39886741017817705314

[1,2,9,58,485,4986,60517,846434,13384233, 235915570,4583337761,97257637962,2237249019469, 55438067438378,1471848284860605,41673308546595826, 1253228243522934737,39886741017817705314]