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A009371 as a simple table

na(n)
00
11
21
34
40
545
6-155
71748
8-13496
9151169
10-1682191
1122018412
12-307464872
134746159613
14-78744546907
151410956472396
16-27026759291728
17552443153007777
18-11988735452427903
19275451486233018100
20-6677966707663119664

[0,1,1,4,0,45,-155,1748,-13496,151169,-1682191,
 22018412,-307464872,4746159613,-78744546907,
 1410956472396,-27026759291728,552443153007777,
 -11988735452427903,275451486233018100,
 -6677966707663119664]