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A228863 as a simple table

n a(n)
1 1
2 -1
3 1
4 -2
5 3
6 -4
7 6
8 -10
9 18
10 -35
11 71
12 -147
13 303
14 -616
15 1244
16 -2508
17 5067
18 -10296
19 21097
20 -43624
21 90929
22 -190629
23 401053
24 -845374
25 1784015
26 -3768964
27 7973941
28 -16902610
29 35909941
30 -76473042
31 163227753
32 -349117291
33 748032779
34 -1605215441
35 3449280634
36 -7420879949
37 15984045722

[1,-1,1,-2,3,-4,6,-10,18,-35,71,-147,303,-616,
 1244,-2508,5067,-10296,21097,-43624,90929,-190629,
 401053,-845374,1784015,-3768964,7973941,-16902610,
 35909941,-76473042,163227753,-349117291,748032779,
 -1605215441,3449280634,-7420879949,15984045722]

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Last modified August 8 12:20 EDT 2024. Contains 375021 sequences. (Running on oeis4.)