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A276951 as a simple table

na(n)
00
11
21
32
43
54
61
75
82
96
107
118
123
139
144
1510
1611
1712
1813
1914
2015
2116
2217
2318
241
2519
265
2720
2821
2922
302
3123
326
3324
3425
3526
367
3727
388
3928
4029
4130
4231
4332
4433
4534
4635
4736
483
4937
509
5138
5239
5340
544
5541
5610
5742
5843
5944
6011
6145
6212
6346
6447
6548
6649
6750
6851
6952
7053
7154
7213
7355
7414
7556
7657
7758
7815
7959
8016
8160
8261
8362
8417
8563
8618
8764

[0,1,1,2,3,4,1,5,2,6,7,8,3,9,4,10,11,12,13,14,15,
 16,17,18,1,19,5,20,21,22,2,23,6,24,25,26,7,27,8,
 28,29,30,31,32,33,34,35,36,3,37,9,38,39,40,4,41,
 10,42,43,44,11,45,12,46,47,48,49,50,51,52,53,54,
 13,55,14,56,57,58,15,59,16,60,61,62,17,63,18,64]