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A014983 as a simple table

n a(n)
0 0
1 1
2 -2
3 7
4 -20
5 61
6 -182
7 547
8 -1640
9 4921
10 -14762
11 44287
12 -132860
13 398581
14 -1195742
15 3587227
16 -10761680
17 32285041
18 -96855122
19 290565367
20 -871696100
21 2615088301
22 -7845264902
23 23535794707
24 -70607384120
25 211822152361
26 -635466457082
27 1906399371247

[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]

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Last modified February 23 13:30 EST 2020. Contains 332159 sequences. (Running on oeis4.)