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A033948 as a simple table

na(n)
11
22
33
44
55
66
77
89
910
1011
1113
1214
1317
1418
1519
1622
1723
1825
1926
2027
2129
2231
2334
2437
2538
2641
2743
2846
2947
3049
3150
3253
3354
3458
3559
3661
3762
3867
3971
4073
4174
4279
4381
4482
4583
4686
4789
4894
4997
5098
51101
52103
53106
54107
55109
56113
57118
58121
59122
60125
61127
62131
63134
64137
65139

[1,2,3,4,5,6,7,9,10,11,13,14,17,18,19,22,23,25,26,
 27,29,31,34,37,38,41,43,46,47,49,50,53,54,58,59,
 61,62,67,71,73,74,79,81,82,83,86,89,94,97,98,101,
 103,106,107,109,113,118,121,122,125,127,131,134,
 137,139]