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A292854 as a simple table

na(n)
01
1-2
24
3-6
48
5-12
618
7-24
832
9-44
1058
11-76
12100
13-128
14164
15-210
16264
17-332
18416
19-516
20640
21-790
22968
23-1184
241444
25-1752
262120
27-2560
283078
29-3692
304420
31-5272
326276
33-7456
348832
35-10444
3612326
37-14512
3817056
39-20012
4023432
41-27392
4231972
43-37248
4443332
45-50338
4658380
47-67616
4878208
49-90328
50104196

[1,-2,4,-6,8,-12,18,-24,32,-44,58,-76,100,-128,
 164,-210,264,-332,416,-516,640,-790,968,-1184,
 1444,-1752,2120,-2560,3078,-3692,4420,-5272,6276,
 -7456,8832,-10444,12326,-14512,17056,-20012,23432,
 -27392,31972,-37248,43332,-50338,58380,-67616,
 78208,-90328,104196]