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A075559 as a simple table

na(n)
011
112
233
324
415
536
677
748
899
9110
101111
11312
121313
13714
14315
15416
161717
17918
181919
19120
202121
211122
222323
23624
24125
251326
262727
27728
282929
29330
303131
31832
323333
331734
34735
35936
363737
371938
383939
39240
404141
412142
424343
431144
44945
452346
464747
471248
484949

[11,12,33,24,15,36,77,48,99,110,1111,312,1313,714,
 315,416,1717,918,1919,120,2121,1122,2323,624,125,
 1326,2727,728,2929,330,3131,832,3333,1734,735,936,
 3737,1938,3939,240,4141,2142,4343,1144,945,2346,
 4747,1248,4949]