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A009011 as a simple table

na(n)
01
11
2-3
3-3
4665
5-25031
6607893
713065717
8-3684215119
9322746228337
10-2173907680851
11-5317484317809939
121007358319257596489
1346704901267812186793
14-111828938184578058229947
1554497429277597236190513381
16-19349766542166780916394521759

[1,1,-3,-3,665,-25031,607893,13065717,-3684215119,
 322746228337,-2173907680851,-5317484317809939,
 1007358319257596489,46704901267812186793,
 -111828938184578058229947,
 54497429277597236190513381,
 -19349766542166780916394521759]