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A009775 as a simple table

na(n)
00
11
2-1
30
46
5-30
690
70
8-2520
922680
10-113400
110
127484400
13-97297200
14681080400
150
16-81729648000
171389404016000
18-12504636144000
190
202375880867360000
21-49893498214560000
22548828480360160000
230
24-151476660579404160000

[0,1,-1,0,6,-30,90,0,-2520,22680,-113400,0,
 7484400,-97297200,681080400,0,-81729648000,
 1389404016000,-12504636144000,0,2375880867360000,
 -49893498214560000,548828480360160000,0,
 -151476660579404160000]