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A014985 as a simple table

n a(n)
1 1
2 -3
3 13
4 -51
5 205
6 -819
7 3277
8 -13107
9 52429
10 -209715
11 838861
12 -3355443
13 13421773
14 -53687091
15 214748365
16 -858993459
17 3435973837
18 -13743895347
19 54975581389
20 -219902325555
21 879609302221
22 -3518437208883
23 14073748835533

[1,-3,13,-51,205,-819,3277,-13107,52429,-209715,
 838861,-3355443,13421773,-53687091,214748365,
 -858993459,3435973837,-13743895347,54975581389,
 -219902325555,879609302221,-3518437208883,
 14073748835533]

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Last modified April 18 16:41 EDT 2019. Contains 322209 sequences. (Running on oeis4.)