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A020491 as a simple table

na(n)
11
23
35
47
58
69
710
811
913
1015
1117
1218
1319
1421
1523
1624
1726
1828
1929
2030
2131
2233
2334
2435
2537
2639
2740
2841
2943
3045
3147
3249
3351
3452
3553
3655
3756
3857
3958
4059
4161
4263
4365
4467
4569
4670
4771
4872
4973
5074
5176
5277
5378
5479
5582
5683
5784
5885
5987
6088
6189
6290
6391
6493
6595
6697
6798
6899
69101
70102
71103
72104

[1,3,5,7,8,9,10,11,13,15,17,18,19,21,23,24,26,28,
 29,30,31,33,34,35,37,39,40,41,43,45,47,49,51,52,
 53,55,56,57,58,59,61,63,65,67,69,70,71,72,73,74,
 76,77,78,79,82,83,84,85,87,88,89,90,91,93,95,97,
 98,99,101,102,103,104]