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A172520 as a simple table

na(n)
11
22
33
42
54
65
73
84
96
107
112
125
136
148
159
164
175
187
198
2010
2111
222
235
247
259
2610
2712
2813
294
306
318
329
3311
3412
3514
3615
373
386
397
4010
4111
4213
4314
4416
4517
464
475
489
4910
5012
5113
5215
5316
5418
5519
562
577
588
5910
6012
6114
6215
6317
6418
6520
6621
676
687
699
7011
7113
7214
7316
7417
7519
7620
7722
7823
792
805
818
8211
8312

[1,2,3,2,4,5,3,4,6,7,2,5,6,8,9,4,5,7,8,10,11,2,5,
 7,9,10,12,13,4,6,8,9,11,12,14,15,3,6,7,10,11,13,
 14,16,17,4,5,9,10,12,13,15,16,18,19,2,7,8,10,12,
 14,15,17,18,20,21,6,7,9,11,13,14,16,17,19,20,22,
 23,2,5,8,11,12]