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A138621 as a simple table

na(n)
12
26
315
428
544
665
785
8114
9138
10174
11217
12259
13328
14387
15470
16530
17590
18671
19804
20923
211022
221106
231245
241335
251455
261616
271751
281926
292071
302260
312413
322620
332877
343058
353278
363473
373768
384075
394342
404671
415012
425249
435539
445790
456107
466368
476752
487136

[2,6,15,28,44,65,85,114,138,174,217,259,328,387,
 470,530,590,671,804,923,1022,1106,1245,1335,1455,
 1616,1751,1926,2071,2260,2413,2620,2877,3058,3278,
 3473,3768,4075,4342,4671,5012,5249,5539,5790,6107,
 6368,6752,7136]