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A143689 as a simple table

na(n)
01
12
26
313
423
536
652
771
893
9118
10146
11177
12211
13248
14288
15331
16377
17426
18478
19533
20591
21652
22716
23783
24853
25926
261002
271081
281163
291248
301336
311427
321521
331618
341718
351821
361927
372036
382148
392263
402381
412502
422626
432753
442883
453016
463152
473291

[1,2,6,13,23,36,52,71,93,118,146,177,211,248,288,
 331,377,426,478,533,591,652,716,783,853,926,1002,
 1081,1163,1248,1336,1427,1521,1618,1718,1821,1927,
 2036,2148,2263,2381,2502,2626,2753,2883,3016,3152,
 3291]