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A047501 as a simple table

na(n)
11
23
34
45
57
69
711
812
913
1015
1117
1219
1320
1421
1523
1625
1727
1828
1929
2031
2133
2235
2336
2437
2539
2641
2743
2844
2945
3047
3149
3251
3352
3453
3555
3657
3759
3860
3961
4063
4165
4267
4368
4469
4571
4673
4775
4876
4977
5079
5181
5283
5384
5485
5587
5689

[1,3,4,5,7,9,11,12,13,15,17,19,20,21,23,25,27,28,
 29,31,33,35,36,37,39,41,43,44,45,47,49,51,52,53,
 55,57,59,60,61,63,65,67,68,69,71,73,75,76,77,79,
 81,83,84,85,87,89]