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A187947 as a simple table

na(n)
11
22
33
44
55
66
77
89
910
1011
1112
1213
1314
1415
1516
1617
1718
1819
1920
2022
2123
2224
2325
2426
2527
2628
2730
2831
2932
3033
3134
3235
3336
3437
3538
3639
3740
3841
3943
4044
4145
4246
4347
4448
4549
4650
4751
4852
4953
5054
5156
5257
5358
5459
5560
5661
5762
5864
5965
6066
6167
6268
6369
6470
6571
6672
6773
6874
6975
7077
7178
7279
7380
7481
7582
7683
7785
7886
7987
8088
8189
8290
8391
8492
8593
8694
8795
8896
8998
9099
91100

[1,2,3,4,5,6,7,9,10,11,12,13,14,15,16,17,18,19,20,
 22,23,24,25,26,27,28,30,31,32,33,34,35,36,37,38,
 39,40,41,43,44,45,46,47,48,49,50,51,52,53,54,56,
 57,58,59,60,61,62,64,65,66,67,68,69,70,71,72,73,
 74,75,77,78,79,80,81,82,83,85,86,87,88,89,90,91,
 92,93,94,95,96,98,99,100]