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A261679 as a simple table

na(n)
01
12
21
32
42
52
63
72
84
92
105
110
124
130
143
152
164
172
185
190
204
212
226
230
246
250
264
272
284
290
305
312
326
332
347
350
368
370
386
390
404
410
425
430
442
452
464
470
488
490
504
512
526
530
547
550
562
570
584
590
606
610
623
632
644
652
669
670
686
690
704
710
728
732
744
750
764
770
788
790
806
810
826
830
844
852
864
870
884

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