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A083553 as a simple table

na(n)
12
28
324
460
5120
6192
7288
8396
9616
10840
111080
121440
131680
141932
152392
163016
173480
183960
194620
205040
215616
226396
237216
248448
259600
2610200
2710812
2811448
2912096
3014112
3116380
3217680
3318768
3420424
3522200
3623400
3725272
3826892
3928552
4030616
4132040

[2,8,24,60,120,192,288,396,616,840,1080,1440,1680,
 1932,2392,3016,3480,3960,4620,5040,5616,6396,7216,
 8448,9600,10200,10812,11448,12096,14112,16380,
 17680,18768,20424,22200,23400,25272,26892,28552,
 30616,32040]