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A081037 as a simple table

n a(n)
0 1
1 -1
2 3
3 -7
4 16
5 -36
6 80
7 -176
8 384
9 -832
10 1792
11 -3840
12 8192
13 -17408
14 36864
15 -77824
16 163840
17 -344064
18 720896
19 -1507328
20 3145728
21 -6553600
22 13631488
23 -28311552
24 58720256
25 -121634816
26 251658240
27 -520093696
28 1073741824
29 -2214592512
30 4563402752
31 -9395240960
32 19327352832

[1,-1,3,-7,16,-36,80,-176,384,-832,1792,-3840,
 8192,-17408,36864,-77824,163840,-344064,720896,
 -1507328,3145728,-6553600,13631488,-28311552,
 58720256,-121634816,251658240,-520093696,
 1073741824,-2214592512,4563402752,-9395240960,
 19327352832]

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)