A208655 - OEIS

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A208655 as a simple table

n	a(n)
1	1
2	1
3	6
4	36
5	2400
6	90000
7	55566000
8	13553164800
9	72267023646720
10	117595223746560000
11	5219033393851200000000
12	57636380373471744768000000
13	20810790197418148654769602560000
14	1578992018570629416640340512656998400

[1,1,6,36,2400,90000,55566000,13553164800, 72267023646720,117595223746560000, 5219033393851200000000,57636380373471744768000000, 20810790197418148654769602560000, 1578992018570629416640340512656998400]