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A009064 as a simple table

na(n)
01
1-1
2-15
3-297
4-6783
5-70609
618558705
74027228359
8727421677185
9134584692783455
1026232888936219249
115245335359878123191
12971782758809341914369
1396545317222649153850767

[1,-1,-15,-297,-6783,-70609,18558705,4027228359,
 727421677185,134584692783455,26232888936219249,
 5245335359878123191,971782758809341914369,
 96545317222649153850767]