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A248121 as a simple table

na(n)
12
29
320
434
553
676
7102
8133
9168
10206
11249
12296
13346
14401
15460
16522
17589
18660
19734
20813
21896
22982
231073
241168
251266
261369
271476
281586
291701
301820
311942
322069
332200
342334
352473
362616
372762
382913
393068
403226
413389
423556
433726
443901
454080
464262
474449
484640

[2,9,20,34,53,76,102,133,168,206,249,296,346,401,
 460,522,589,660,734,813,896,982,1073,1168,1266,
 1369,1476,1586,1701,1820,1942,2069,2200,2334,2473,
 2616,2762,2913,3068,3226,3389,3556,3726,3901,4080,
 4262,4449,4640]