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A157813 as a simple table

na(n)
11
21
32
43
51
61
72
83
94
105
111
121
132
143
154
165
176
187
195
203
211
221
232
244
255
267
278
289
297
303
311
321
332
343
354
365
376
387
398
409
4110
4211
437
445
451
461
472
483
494
505
516
527
538
549
5510
5611
5712
5813
5911
609
615
623
631
641
652
664
677
688
6911
7013
7114
7215
7313
7411
759
767
775
783
791
801
812
823
834

[1,1,2,3,1,1,2,3,4,5,1,1,2,3,4,5,6,7,5,3,1,1,2,4,
 5,7,8,9,7,3,1,1,2,3,4,5,6,7,8,9,10,11,7,5,1,1,2,3,
 4,5,6,7,8,9,10,11,12,13,11,9,5,3,1,1,2,4,7,8,11,
 13,14,15,13,11,9,7,5,3,1,1,2,3,4]