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A189891 as a simple table

na(n)
11
22
33
44
55
66
78
89
910
1011
1112
1214
1315
1416
1517
1618
1719
1820
1921
2022
2123
2224
2325
2426
2527
2628
2729
2830
2932
3033
3134
3235
3336
3437
3538
3639
3740
3841
3942
4044
4145
4246
4347
4448
4549
4650
4751
4852
4953
5054
5155
5256
5357
5458
5559
5660
5761
5862
5963
6064
6165
6266
6367
6468
6569
6670
6771
6872
6974
7075
7176
7277
7378
7479
7580

[1,2,3,4,5,6,8,9,10,11,12,14,15,16,17,18,19,20,21,
 22,23,24,25,26,27,28,29,30,32,33,34,35,36,37,38,
 39,40,41,42,44,45,46,47,48,49,50,51,52,53,54,55,
 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,
 72,74,75,76,77,78,79,80]