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A073491 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1011
1112
1213
1315
1416
1517
1618
1719
1823
1924
2025
2127
2229
2330
2431
2532
2635
2736
2837
2941
3043
3145
3247
3348
3449
3553
3654
3759
3860
3961
4064
4167
4271
4372
4473
4575
4677
4779
4881
4983
5089
5190
5296
5397
54101
55103
56105
57107
58108
59109
60113
61120
62121
63125
64127
65128
66131
67135

[1,2,3,4,5,6,7,8,9,11,12,13,15,16,17,18,19,23,24,
 25,27,29,30,31,32,35,36,37,41,43,45,47,48,49,53,
 54,59,60,61,64,67,71,72,73,75,77,79,81,83,89,90,
 96,97,101,103,105,107,108,109,113,120,121,125,127,
 128,131,135]