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A012089 as a simple table

na(n)
01
11
29
357
45169
5-93807
631981689
7-3857766903
81058896281825
9-286891166986335
10108826313005021545
11-47766338018402914215
1225721485923005221938705
13-16179153687877979599066575

[1,1,9,57,5169,-93807,31981689,-3857766903,
 1058896281825,-286891166986335,108826313005021545,
 -47766338018402914215,25721485923005221938705,
 -16179153687877979599066575]