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A154879 as a simple table

n a(n)
0 3
1 -2
2 4
3 0
4 8
5 8
6 24
7 40
8 88
9 168
10 344
11 680
12 1368
13 2728
14 5464
15 10920
16 21848
17 43688
18 87384
19 174760
20 349528
21 699048
22 1398104
23 2796200
24 5592408
25 11184808
26 22369624
27 44739240
28 89478488
29 178956968
30 357913944
31 715827880
32 1431655768
33 2863311528
34 5726623064

[3,-2,4,0,8,8,24,40,88,168,344,680,1368,2728,5464,
 10920,21848,43688,87384,174760,349528,699048,
 1398104,2796200,5592408,11184808,22369624,
 44739240,89478488,178956968,357913944,715827880,
 1431655768,2863311528,5726623064]

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Last modified April 24 04:40 EDT 2019. Contains 322406 sequences. (Running on oeis4.)