A067302 - OEIS

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A067302 as a simple table

n	a(n)
0	1
1	3
2	18
3	160
4	1752
5	21504
6	282304
7	3867840
8	54547200
9	785255680
10	11478167040
11	169748686848
12	2533556365312
13	38094656593920
14	576271774875648
15	8761529890717696
16	133776598692003840
17	2050020136793604096

[1,3,18,160,1752,21504,282304,3867840,54547200, 785255680,11478167040,169748686848,2533556365312, 38094656593920,576271774875648,8761529890717696, 133776598692003840,2050020136793604096]