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A046820 as a simple table

na(n)
00
12
22
34
42
53
64
73
82
94
103
115
124
132
143
154
162
174
184
196
203
214
225
235
244
256
262
274
283
293
304
315
322
334
344
356
364
375
386
394
403
415
424
436
445
454
465
476
484
496
506
518
522
533
544
554
563
575
583
595
604
614
625
636
642
654
664
676
684
695
706
715
724
736
745
757
766
773
784
795
803
815
825
837
844
855
866
876
885
897
904
916
925

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