A162654 - OEIS

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A162654 as a simple table

n	a(n)
0	1
1	1
2	0
3	3
4	24
5	65
6	480
7	8827
8	72576
9	657729
10	13754880
11	215578451
12	2884992000
13	62280478273
14	1404449120256
15	27032417472075
16	640338738708480
17	17729894860794497
18	453894468727209984
19	12438629293065953059

[1,1,0,3,24,65,480,8827,72576,657729,13754880, 215578451,2884992000,62280478273,1404449120256, 27032417472075,640338738708480,17729894860794497, 453894468727209984,12438629293065953059]