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A126972 as a simple table

na(n)
01
11
22
34
411
521
636
757
885
9121
10166
11221
12287
13365
14456
15561
16681
17817
18970
191141
201331
211541
221772
232025
242301
252601
262926
273277
283655
294061
304496
314961
325457
335985
346546
357141
367771
378437
389140
399881
4010661
4111481
4212342
4313245
4414191
4515181
4616216

[1,1,2,4,11,21,36,57,85,121,166,221,287,365,456,
 561,681,817,970,1141,1331,1541,1772,2025,2301,
 2601,2926,3277,3655,4061,4496,4961,5457,5985,6546,
 7141,7771,8437,9140,9881,10661,11481,12342,13245,
 14191,15181,16216]