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A289672 as a simple table

na(n)
14
23
34
47
58
67
714
815
914
1015
1116
1215
1324
1425
1528
1629
1730
1835
1938
2039
2138
2239
2338

[4,3,4,7,8,7,14,15,14,15,16,15,24,25,28,29,30,35,
 38,39,38,39,38]