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A157421 as a simple table

na(n)
01
12
25
311
417
526
637
750
867
982
10101
11122
12145
13171
14197
15226
16257
17290
18327
19362
20401
21442
22485
23531
24577
25626
26677
27730
28787
29842
30901
31962
321025
331091
341157
351226
361297
371370
381447
391522
401601
411682
421765
431851
441937
452026
462117
472210
482307
492402
502501

[1,2,5,11,17,26,37,50,67,82,101,122,145,171,197,
 226,257,290,327,362,401,442,485,531,577,626,677,
 730,787,842,901,962,1025,1091,1157,1226,1297,1370,
 1447,1522,1601,1682,1765,1851,1937,2026,2117,2210,
 2307,2402,2501]