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A100991 as a simple table

na(n)
10
21
33
44
57
68
79
811
912
1013
1116
1217
1319
1421
1523
1624
1725
1827
1928
2029
2131
2232
2333
2436
2537
2639

[0,1,3,4,7,8,9,11,12,13,16,17,19,21,23,24,25,27,
 28,29,31,32,33,36,37,39]