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A083943 as a simple table

n a(n)
0 0
1 1
2 -1
3 -1
4 -5
5 -9
6 -21
7 -41
8 -85
9 -169
10 -341
11 -681
12 -1365
13 -2729
14 -5461
15 -10921
16 -21845
17 -43689
18 -87381
19 -174761
20 -349525
21 -699049
22 -1398101
23 -2796201
24 -5592405
25 -11184809
26 -22369621
27 -44739241
28 -89478485
29 -178956969
30 -357913941
31 -715827881
32 -1431655765

[0,1,-1,-1,-5,-9,-21,-41,-85,-169,-341,-681,-1365,
 -2729,-5461,-10921,-21845,-43689,-87381,-174761,
 -349525,-699049,-1398101,-2796201,-5592405,
 -11184809,-22369621,-44739241,-89478485,
 -178956969,-357913941,-715827881,-1431655765]

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Last modified May 28 07:18 EDT 2022. Contains 354112 sequences. (Running on oeis4.)