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A100503 as a simple table

na(n)
01
14
215
342
493
5176
6299
7470
8697
9988
101351
111794
122325
132952
143683
154526
165489
176580
187807
199178
2010701
2112384
2214235
2316262
2418473
2520876
2623479
2726290
2829317
2932568
3036051
3139774
3243745
3347972
3452463
3557226
3662269
3767600
3873227
3979158

[1,4,15,42,93,176,299,470,697,988,1351,1794,2325,
 2952,3683,4526,5489,6580,7807,9178,10701,12384,
 14235,16262,18473,20876,23479,26290,29317,32568,
 36051,39774,43745,47972,52463,57226,62269,67600,
 73227,79158]