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A255526 as a simple table

n a(n)
1 -1
2 1
3 -4
4 17
5 -56
6 172
7 -547
8 1809
9 -6061
10 20316
11 -68135
12 229244
13 -774372
14 2624119
15 -8912759
16 30328593
17 -103382254
18 352975681
19 -1206921212
20 4132159452
21 -14163858895
22 48601267199
23 -166930975524
24 573872089212
25 -1974472043081
26 6798561779868
27 -23425506369715

[-1,1,-4,17,-56,172,-547,1809,-6061,20316,-68135,
 229244,-774372,2624119,-8912759,30328593,
 -103382254,352975681,-1206921212,4132159452,
 -14163858895,48601267199,-166930975524,
 573872089212,-1974472043081,6798561779868,
 -23425506369715]

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Last modified July 16 04:26 EDT 2019. Contains 325064 sequences. (Running on oeis4.)