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A026342 as a simple table

na(n)
11
21
32
43
52
63
74
85
96
107
114
125
138
146
157
169
1710
1811
1912
208
2113
2214
2315
249
2516
2610
2711
2817
2912
3018
3119
3213
3314
3420
3515
3621
3722
3816
3923
4024
4125
4217
4326
4427
4518
4628
4719
4829
4930
5031
5120
5232
5333
5421
5534
5622
5735
5836
5923
6024
6137
6225
6338
6439
6526
6627

[1,1,2,3,2,3,4,5,6,7,4,5,8,6,7,9,10,11,12,8,13,14,
 15,9,16,10,11,17,12,18,19,13,14,20,15,21,22,16,23,
 24,25,17,26,27,18,28,19,29,30,31,20,32,33,21,34,
 22,35,36,23,24,37,25,38,39,26,27]