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A084241 as a simple table

n a(n)
0 0
1 1
2 -5
3 21
4 -85
5 341
6 -1365
7 5461
8 -21845
9 87381
10 -349525
11 1398101
12 -5592405
13 22369621
14 -89478485
15 357913941
16 -1431655765
17 5726623061
18 -22906492245
19 91625968981
20 -366503875925
21 1466015503701
22 -5864062014805
23 23456248059221
24 -93824992236885

[0,1,-5,21,-85,341,-1365,5461,-21845,87381,
 -349525,1398101,-5592405,22369621,-89478485,
 357913941,-1431655765,5726623061,-22906492245,
 91625968981,-366503875925,1466015503701,
 -5864062014805,23456248059221,-93824992236885]

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Last modified November 27 02:26 EST 2021. Contains 349344 sequences. (Running on oeis4.)