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A098240 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1213
1314
1415
1516
1617
1718
1819
1920
2021
2122
2223
2325
2426
2527
2628
2729
2830
2931
3032
3133
3234
3335
3436
3538
3639
3740
3841
3942
4043
4144
4245
4346
4447
4548
4649
4750
4851
4952
5053
5154
5255
5356
5457
5558
5659
5761
5863
5964
6065
6166
6267
6368
6469
6570
6671
6772
6873
6974
7075
7176
7277

[1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,
 21,22,23,25,26,27,28,29,30,31,32,33,34,35,36,38,
 39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,
 55,56,57,58,59,61,63,64,65,66,67,68,69,70,71,72,
 73,74,75,76,77]