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A009149 as a simple table

na(n)
01
10
212
3-120
42576
5-106560
64690752
7-251957888
817894058240
9-1518819416064
10147193120578560
11-16536681255671808
122144498299945291776
13-313806765843863552000
1451199709803672550916096

[1,0,12,-120,2576,-106560,4690752,-251957888,
 17894058240,-1518819416064,147193120578560,
 -16536681255671808,2144498299945291776,
 -313806765843863552000,51199709803672550916096]