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A249830 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1819
1920
2021
2122
2223
2324
2425
2527
2628
2729
2830
2931
3032
3133
3235
3336
3437
3538
3639
3740
3841
3943
4044
4145
4246
4347
4448
4549
4650
4751
4852
4953
5054
5155
5256
5357
5458
5560
5661
5762
5863
5964
6065
6166
6268
6369
6470
6571
6672
6773

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,19,20,
 21,22,23,24,25,27,28,29,30,31,32,33,35,36,37,38,
 39,40,41,43,44,45,46,47,48,49,50,51,52,53,54,55,
 56,57,58,60,61,62,63,64,65,66,68,69,70,71,72,73]