A188959 - OEIS

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A188959 as a simple table

n	a(n)
1	2
2	24
3	720
4	24024
5	570050
6	12702057
7	298167456
8	7208117568
9	173161739904
10	4127570837184
11	98339773309856
12	2347000930925753
13	56041331020681154
14	1337774984135116376
15	31928671287098350544
16	762059700266910857880

[2,24,720,24024,570050,12702057,298167456, 7208117568,173161739904,4127570837184, 98339773309856,2347000930925753,56041331020681154, 1337774984135116376,31928671287098350544, 762059700266910857880]