A084873 - OEIS

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A084873 as a simple table

n	a(n)
0	1
1	2
2	9
3	73
4	1212
5	44667
6	3251186
7	345094227
8	39552733796
9	4234657495267
10	409948262617398
11	36190736880911571
12	2964860272283578040
13	229165985114590010307
14	16940021231116707830570

[1,2,9,73,1212,44667,3251186,345094227, 39552733796,4234657495267,409948262617398, 36190736880911571,2964860272283578040, 229165985114590010307,16940021231116707830570]