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A031943 as a simple table

na(n)
11
22
33
44
55
67
78
89
910
1011
1113
1214
1315
1416
1517
1619
1720
1821
1922
2023
2126
2227
2328
2429
2535
2636
2738
2839
2940
3041
3142
3244
3345
3446
3547
3648
3751
3852
3953
4054
4155
4257
4358
4459
4565
4666
4767
4869
4970
5071
5172
5273
5376
5477
5578
5679
5780
5882
5983
6084
6185
6286
6388

[1,2,3,4,5,7,8,9,10,11,13,14,15,16,17,19,20,21,22,
 23,26,27,28,29,35,36,38,39,40,41,42,44,45,46,47,
 48,51,52,53,54,55,57,58,59,65,66,67,69,70,71,72,
 73,76,77,78,79,80,82,83,84,85,86,88]