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A042968 as a simple table

na(n)
11
22
33
45
56
67
79
810
911
1013
1114
1215
1317
1418
1519
1621
1722
1823
1925
2026
2127
2229
2330
2431
2533
2634
2735
2837
2938
3039
3141
3242
3343
3445
3546
3647
3749
3850
3951
4053
4154
4255
4357
4458
4559
4661
4762
4863
4965
5066
5167
5269
5370
5471
5573
5674
5775
5877
5978
6079
6181
6282
6383
6485
6586
6687
6789
6890
6991
7093
7194
7295
7397
7498
7599
76101
77102

[1,2,3,5,6,7,9,10,11,13,14,15,17,18,19,21,22,23,
 25,26,27,29,30,31,33,34,35,37,38,39,41,42,43,45,
 46,47,49,50,51,53,54,55,57,58,59,61,62,63,65,66,
 67,69,70,71,73,74,75,77,78,79,81,82,83,85,86,87,
 89,90,91,93,94,95,97,98,99,101,102]