A182957 - OEIS

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A182957 as a simple table

n	a(n)
0	1
1	1
2	3
3	17
4	151
5	1824
6	27541
7	494997
8	10273039
9	241217147
10	6314907390
11	182283959604
12	5750796304553
13	196865960240416
14	7268410972604665
15	287920792767378837
16	12181570018235995359
17	548274960053921957856

[1,1,3,17,151,1824,27541,494997,10273039, 241217147,6314907390,182283959604,5750796304553, 196865960240416,7268410972604665, 287920792767378837,12181570018235995359, 548274960053921957856]