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A194770 as a simple table

na(n)
11
2-1
30
46
5-24
60
7720
8-5040
90
10362880
11-3628800
120
13479001600
14-6227020800
150
161307674368000
17-20922789888000
180
196402373705728000
20-121645100408832000
210
2251090942171709440000
23-1124000727777607680000

[1,-1,0,6,-24,0,720,-5040,0,362880,-3628800,0,
 479001600,-6227020800,0,1307674368000,
 -20922789888000,0,6402373705728000,
 -121645100408832000,0,51090942171709440000,
 -1124000727777607680000]