A078450 - OEIS

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A078450 as a simple table

n	a(n)
1	1
2	6
3	140
4	10296
5	1560090
6	818269800
7	890504276970
8	578105086816530
9	845098382127164340
10	1345577210752717337010
11	2349420395175736366400280
12	4072812804055080385050520770
13	16954222832305267550769863845710

[1,6,140,10296,1560090,818269800,890504276970, 578105086816530,845098382127164340, 1345577210752717337010,2349420395175736366400280, 4072812804055080385050520770, 16954222832305267550769863845710]