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A261649 as a simple table

na(n)
01
14
28
312
420
536
656
780
8120
9180
10252
11348
12492
13680
14912
151228
161652
172180
182856
193744
204860
216256
228044
2310284
2413048
2516520
2620848
2726140
2832672
2940756
3050596
3162576
3277256
3395060
34116540
35142592
36174036
37211736
38257056
39311448
40376332
41453764
42546160

[1,4,8,12,20,36,56,80,120,180,252,348,492,680,912,
 1228,1652,2180,2856,3744,4860,6256,8044,10284,
 13048,16520,20848,26140,32672,40756,50596,62576,
 77256,95060,116540,142592,174036,211736,257056,
 311448,376332,453764,546160]