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A160224 as a simple table

na(n)
01
12
2-1678
3-10084
48447020
584739192
6-70869959816
7-996927845296
8832429051182992
915079519188668960
10-12571151938430794976
11-278779816630273497152
12232033893531586021651648
136090959605928612309819264
14-5061471196749802724815296640

[1,2,-1678,-10084,8447020,84739192,-70869959816,
 -996927845296,832429051182992,15079519188668960,
 -12571151938430794976,-278779816630273497152,
 232033893531586021651648,
 6090959605928612309819264,
 -5061471196749802724815296640]