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A109629 as a simple table

n a(n)
0 0
1 1
2 1
3 -4
4 12
5 -28
6 52
7 -80
8 112
9 -176
10 376
11 -976
12 2536
13 -6112
14 13504
15 -27456
16 51552
17 -89344
18 142240
19 -206656
20 274800
21 -354240
22 546976
23 -1283648
24 3918800
25 -12104064
26 34744256
27 -92031104
28 227231104
29 -528840704
30 1170706304
31 -2481880320

[0,1,1,-4,12,-28,52,-80,112,-176,376,-976,2536,
 -6112,13504,-27456,51552,-89344,142240,-206656,
 274800,-354240,546976,-1283648,3918800,-12104064,
 34744256,-92031104,227231104,-528840704,
 1170706304,-2481880320]

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Last modified March 29 10:59 EDT 2024. Contains 371277 sequences. (Running on oeis4.)