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A321308 as a simple table

na(n)
12
216
328
4160
5280
6512
7520
8644
9820
101040
111204
121640
132000
142072
152288
162720
172920
183416
193800
203976
214648
224664
234736
245312
255600
266136
276188
286496
296968
307936
318080
328300
338944
3411792
3511984
3612512
3712656
3813624
3914060
4014416
4114768
4215680
4316000
4416384

[2,16,28,160,280,512,520,644,820,1040,1204,1640,
 2000,2072,2288,2720,2920,3416,3800,3976,4648,4664,
 4736,5312,5600,6136,6188,6496,6968,7936,8080,8300,
 8944,11792,11984,12512,12656,13624,14060,14416,
 14768,15680,16000,16384]