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A111643 as a simple table

n a(n)
0 -2
1 8
2 -34
3 136
4 -530
5 2032
6 -7714
7 29104
8 -109378
9 410040
10 -1534722
11 5738360
12 -21441682
13 80083808
14 -299027394
15 1116348896
16 -4167148290
17 15554127592
18 -58053908834
19 216672484584
20 -808662529938
21 3018041612880
22 -11263658377442
23 42036964786320
24 -156885101002562

[-2,8,-34,136,-530,2032,-7714,29104,-109378,
 410040,-1534722,5738360,-21441682,80083808,
 -299027394,1116348896,-4167148290,15554127592,
 -58053908834,216672484584,-808662529938,
 3018041612880,-11263658377442,42036964786320,
 -156885101002562]

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Last modified March 28 11:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)