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A262966 as a simple table

na(n)
01
10
22
3-2
44
5-4
68
7-8
814
9-16
1024
11-28
1242
13-48
1468
15-80
16108
17-128
18170
19-200
20260
21-308
22392
23-464
24584
25-688
26856
27-1010
281240
29-1460
301780
31-2088
322526
33-2960
343552
35-4152
364956
37-5776
386856
39-7976
409416
41-10928
4212848
43-14872
4417412
45-20116
4623456

[1,0,2,-2,4,-4,8,-8,14,-16,24,-28,42,-48,68,-80,
 108,-128,170,-200,260,-308,392,-464,584,-688,856,
 -1010,1240,-1460,1780,-2088,2526,-2960,3552,-4152,
 4956,-5776,6856,-7976,9416,-10928,12848,-14872,
 17412,-20116,23456]