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A181092 as a simple table

na(n)
11
22
33
45
56
67
78
89
911
1012
1113
1214
1315
1416
1517
1620
1721
1822
1923
2024
2125
2226
2327
2428
2530
2631
2732
2833
2934
3035
3136
3237
3338
3439
3540
3642
3743
3844
3945
4046
4147
4248
4349
4450
4551
4652
4753
4854
4956
5057
5158
5259
5360
5461
5562
5663
5764
5865
5966
6067
6168
6269
6370
6472
6573
6674
6775
6876
6977
7078
7179
7280

[1,2,3,5,6,7,8,9,11,12,13,14,15,16,17,20,21,22,23,
 24,25,26,27,28,30,31,32,33,34,35,36,37,38,39,40,
 42,43,44,45,46,47,48,49,50,51,52,53,54,56,57,58,
 59,60,61,62,63,64,65,66,67,68,69,70,72,73,74,75,
 76,77,78,79,80]