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A335986 as a simple table

n a(n)
1 1
2 -1
3 -2
4 -2
5 2
6 12
7 0
8 -190
9 -696
10 1960
11 29592
12 49750
13 -1200226
14 -8200478
15 51479530
16 992408898
17 -517104450
18 -133585331394
19 -757952722052
20 18448429372430
21 284177581205280
22 -2033645276651570
23 -87779867499696610
24 -122540992214640738
25 26825921931152034414

[1,-1,-2,-2,2,12,0,-190,-696,1960,29592,49750,
 -1200226,-8200478,51479530,992408898,-517104450,
 -133585331394,-757952722052,18448429372430,
 284177581205280,-2033645276651570,
 -87779867499696610,-122540992214640738,
 26825921931152034414]

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Last modified October 27 01:02 EDT 2020. Contains 338035 sequences. (Running on oeis4.)