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A089241 as a simple table

na(n)
16
28
312
416
524
628
736
840
948
1060
1164
1276
1384
1488
1596
16108
17120
18124
19136
20144
21148
22160
23168
24180
25196
26204
27208
28216
29220
30228
31256
32264
33276
34280
35300
36304
37316
38328
39336
40348
41360
42364
43384
44388
45396
46400
47424
48448
49456
50460
51468
52480
53484

[6,8,12,16,24,28,36,40,48,60,64,76,84,88,96,108,
 120,124,136,144,148,160,168,180,196,204,208,216,
 220,228,256,264,276,280,300,304,316,328,336,348,
 360,364,384,388,396,400,424,448,456,460,468,480,
 484]