A122483 - OEIS

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A122483 as a simple table

n	a(n)
1	6
2	140
3	312
4	1560
5	14384
6	18018
7	40992
8	2337400
9	7012200
10	11027016
11	231402600
12	534775296
13	9866296440
14	11453072202

[6,140,312,1560,14384,18018,40992,2337400,7012200, 11027016,231402600,534775296,9866296440, 11453072202]