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A071912 as a simple table

na(n)
00
11
21
32
41
53
62
73
81
94
103
114
121
135
144
155
163
175
182
195
201
216
225
236
241
257
266
277
285
297
304
317
323
337
342
357
361
378
387
398
405
418
423
438
441
459
468
479
487
499
505
519
524
539
542
559
561
5710
589
5910
607
6110
623
6310
641
6511
6610
6711
689
6911
708
7111
727
7311
746
7511
765
7711
784
7911
803
8111
822
8311
841
8512
8611
8712
887
8912

[0,1,1,2,1,3,2,3,1,4,3,4,1,5,4,5,3,5,2,5,1,6,5,6,
 1,7,6,7,5,7,4,7,3,7,2,7,1,8,7,8,5,8,3,8,1,9,8,9,7,
 9,5,9,4,9,2,9,1,10,9,10,7,10,3,10,1,11,10,11,9,11,
 8,11,7,11,6,11,5,11,4,11,3,11,2,11,1,12,11,12,7,
 12]