A005060 - OEIS

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A005060 as a simple table

n	a(n)
0	0
1	1
2	9
3	61
4	369
5	2101
6	11529
7	61741
8	325089
9	1690981
10	8717049
11	44633821
12	227363409
13	1153594261
14	5835080169
15	29443836301
16	148292923329
17	745759583941
18	3745977788889
19	18798608421181
20	94267920012849

[0,1,9,61,369,2101,11529,61741,325089,1690981, 8717049,44633821,227363409,1153594261,5835080169, 29443836301,148292923329,745759583941, 3745977788889,18798608421181,94267920012849]