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A141671 as a simple table

na(n)
01
12
21
33
42
51
64
73
80
91
105
114
122
130
141
156
165
170
180
190
201
217
226
233
242
250
260
271
288
297
300
310
320
330
340
351
369
378
384
390
402
410
420
430
441
4510
469
470
483
490
500
510
520
530
541
5511
5610
575
580
590
602
610
620
630
640
651
6612
6711
680
690
700
710
720
730
740
750
760
771
7813
7912
806
814
823
830
842
850
860
870
880
890
901

[1,2,1,3,2,1,4,3,0,1,5,4,2,0,1,6,5,0,0,0,1,7,6,3,
 2,0,0,1,8,7,0,0,0,0,0,1,9,8,4,0,2,0,0,0,1,10,9,0,
 3,0,0,0,0,0,1,11,10,5,0,0,2,0,0,0,0,1,12,11,0,0,0,
 0,0,0,0,0,0,1,13,12,6,4,3,0,2,0,0,0,0,0,1]