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A026400 as a simple table

na(n)
11
22
33
42
54
63
75
86
93
104
117
125
134
146
158
169
174
185
197
206
2110
225
238
2411
257
266
275
289
2912
3013
318
326
337
349
3510
3611
3714
386
397
408
4110
4212
439
4413
4515
467
478
4811
4916
5017
5110
529
537
5412
558
5613
5711
5814
5918
6015
619
6210
638
6419
6512
6614
6716
6811
6913
709
718
7210
7317
7420
7515

[1,2,3,2,4,3,5,6,3,4,7,5,4,6,8,9,4,5,7,6,10,5,8,
 11,7,6,5,9,12,13,8,6,7,9,10,11,14,6,7,8,10,12,9,
 13,15,7,8,11,16,17,10,9,7,12,8,13,11,14,18,15,9,
 10,8,19,12,14,16,11,13,9,8,10,17,20,15]