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A329824 as a simple table

na(n)
12
24
38
416
532
656
784
8120
9164
10226
11312
12428
13584
14802
151096
161500
172056
182816
193852
205280
217228
229892
2313548
2418554
2525396
2634788
2747636
2865212
2989296
30122278
31167404
32229252
33313932
34429830
35588556
36805910
371103420
381510924
392068960
402832944
413879100

[2,4,8,16,32,56,84,120,164,226,312,428,584,802,
 1096,1500,2056,2816,3852,5280,7228,9892,13548,
 18554,25396,34788,47636,65212,89296,122278,167404,
 229252,313932,429830,588556,805910,1103420,
 1510924,2068960,2832944,3879100]