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A026509 as a simple table

na(n)
11
22
34
45
56
67
78
89
910
1012
1114
1216
1318
1420
1522
1623
1724
1826
1927
2028
2130
2231
2334
2435
2538
2639
2742
2843
2946
3048
3150
3254
3356
3458
3559
3662
3764
3865
3966
4067
4170
4273
4374
4475
4578
4682
4783
4886
4989
5090
5191
5294
5395
5498
5599
56102
57103
58104
59106
60107
61110
62111
63114
64118
65120
66121
67122
68123

[1,2,4,5,6,7,8,9,10,12,14,16,18,20,22,23,24,26,27,
 28,30,31,34,35,38,39,42,43,46,48,50,54,56,58,59,
 62,64,65,66,67,70,73,74,75,78,82,83,86,89,90,91,
 94,95,98,99,102,103,104,106,107,110,111,114,118,
 120,121,122,123]