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A212960 as a simple table

na(n)
00
14
216
344
492
5168
6276
7424
8616
9860
101160
111524
121956
132464
143052
153728
164496
175364
186336
197420
208620
219944
2211396
2312984
2414712
2516588
2618616
2720804
2823156
2925680
3028380
3131264
3234336
3337604
3441072
3544748
3648636
3752744
3857076

[0,4,16,44,92,168,276,424,616,860,1160,1524,1956,
 2464,3052,3728,4496,5364,6336,7420,8620,9944,
 11396,12984,14712,16588,18616,20804,23156,25680,
 28380,31264,34336,37604,41072,44748,48636,52744,
 57076]