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A014983 as a simple table

na(n)
00
11
2-2
37
4-20
561
6-182
7547
8-1640
94921
10-14762
1144287
12-132860
13398581
14-1195742
153587227
16-10761680
1732285041
18-96855122
19290565367
20-871696100
212615088301
22-7845264902
2323535794707
24-70607384120
25211822152361
26-635466457082
271906399371247

[0,1,-2,7,-20,61,-182,547,-1640,4921,-14762,44287,
 -132860,398581,-1195742,3587227,-10761680,
 32285041,-96855122,290565367,-871696100,
 2615088301,-7845264902,23535794707,-70607384120,
 211822152361,-635466457082,1906399371247]