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A246147 as a simple table

na(n)
00
13
26
312
420
530
636
768
892
9116
10132
11156
12180
13228
14260
15308
16356
17420
18452
19516
20564
21612
22676
23708
24756
25804
26836
27900
28948
29996
301076
311188
321268
331316
341460
351572
361716
371764
381844
391956
402100
412212
422292
432340
442484
452740
462868
473060
483252
493380

[0,3,6,12,20,30,36,68,92,116,132,156,180,228,260,
 308,356,420,452,516,564,612,676,708,756,804,836,
 900,948,996,1076,1188,1268,1316,1460,1572,1716,
 1764,1844,1956,2100,2212,2292,2340,2484,2740,2868,
 3060,3252,3380]