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A271513 as a simple table

na(n)
01
13
22
31
44
56
63
72
82
95
106
111
122
135
144
152
164
174
183
192
206
215
221
231
243
258
266
272
284
296
306
314
322
333
348
353
367
377
381
396
406
418
426
431
442
4511
467
471
482
4912
508
512
527
535
549
554
564
574
587
592
604
619
624
637
644
6511
666
671
685
698
707

[1,3,2,1,4,6,3,2,2,5,6,1,2,5,4,2,4,4,3,2,6,5,1,1,
 3,8,6,2,4,6,6,4,2,3,8,3,7,7,1,6,6,8,6,1,2,11,7,1,
 2,12,8,2,7,5,9,4,4,4,7,2,4,9,4,7,4,11,6,1,5,8,7]