A153562 - OEIS

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A153562 as a simple table

n	a(n)
0	1
1	2
2	8
3	64
4	1013
5	31869
6	1992534
7	247558629
8	61112555786
9	29976738429513
10	29217359282937611
11	56584755763000220383
12	217750594586406237874109
13	1665025253965862500069864035
14	25297866393357843671537945295440

[1,2,8,64,1013,31869,1992534,247558629, 61112555786,29976738429513,29217359282937611, 56584755763000220383,217750594586406237874109, 1665025253965862500069864035, 25297866393357843671537945295440]