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A020723 as a simple table

na(n)
09
110
211
312
413
514
615
716
817
918
1019
1120
1221
1322
1423
1524
1625
1726
1827
1928
2029
2130
2231
2332
2433
2534
2635
2736
2837
2938
3039
3140
3241
3342
3443
3544
3645
3746
3847
3948
4049
4150
4251
4352
4453
4554
4655
4756
4857
4958
5059
5160
5261
5362
5463
5564
5665
5766
5867
5968
6069
6170
6271
6372
6473
6574
6675
6776
6877
6978
7079
7180
7281

[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
 25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
 41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,
 57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,
 73,74,75,76,77,78,79,80,81]