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A013009 as a simple table

na(n)
00
11
2-3
310
4-55
5393
6-3485
736923
8-455306
96408445
10-101402557
111782112451
12-34444583072
13726178939315
14-16584396680007
15407872396640525
16-10747394439586016
17302068718096449161
18-9020579413121532169

[0,1,-3,10,-55,393,-3485,36923,-455306,6408445,
 -101402557,1782112451,-34444583072,726178939315,
 -16584396680007,407872396640525,
 -10747394439586016,302068718096449161,
 -9020579413121532169]