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A111643 as a simple table

na(n)
0-2
18
2-34
3136
4-530
52032
6-7714
729104
8-109378
9410040
10-1534722
115738360
12-21441682
1380083808
14-299027394
151116348896
16-4167148290
1715554127592
18-58053908834
19216672484584
20-808662529938
213018041612880
22-11263658377442
2342036964786320
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]