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A227454 as a simple table

n a(n)
1 1
2 -3
3 9
4 -22
5 51
6 -108
7 221
8 -429
9 810
10 -1476
11 2631
12 -4572
13 7802
14 -13056
15 21519
16 -34918
17 55935
18 -88452
19 138332
20 -213990
21 327852
22 -497592
23 748833
24 -1117692
25 1655719
26 -2434938
27 3556791
28 -5161808
29 7445631
30 -10677096
31 15226658
32 -21599469
33 30485268
34 -42817788

[1,-3,9,-22,51,-108,221,-429,810,-1476,2631,-4572,
 7802,-13056,21519,-34918,55935,-88452,138332,
 -213990,327852,-497592,748833,-1117692,1655719,
 -2434938,3556791,-5161808,7445631,-10677096,
 15226658,-21599469,30485268,-42817788]

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Last modified April 14 07:59 EDT 2021. Contains 342946 sequences. (Running on oeis4.)