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A299257 as a simple table

na(n)
01
15
212
322
436
556
682
7111
8144
9183
10226
11272
12324
13382
14442
15505
16576
17653
18730
19810
20900
21996
221090
231187
241296
251411
261522
271636
281764
291898
302026
312157
322304
332457
342602
352750
362916
373088
383250
393415
403600
413791
423970
434152
444356
454566
464762
474961
485184
495413
505626
515842
526084
536332

[1,5,12,22,36,56,82,111,144,183,226,272,324,382,
 442,505,576,653,730,810,900,996,1090,1187,1296,
 1411,1522,1636,1764,1898,2026,2157,2304,2457,2602,
 2750,2916,3088,3250,3415,3600,3791,3970,4152,4356,
 4566,4762,4961,5184,5413,5626,5842,6084,6332]