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A053835 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
151
162
173
184
195
206
217
228
239
2410
2511
2612
2713
2814
2915
302
313
324
335
346
357
368
379
3810
3911
4012
4113
4214
4315
4416
453
464
475
486
497
508
519
5210
5311
5412
5513
5614
5715
5816
5917
604
615
626
637
648
659
6610
6711
6812
6913
7014
7115
7216
7317
7418
755
766
777
788
799
8010
8111
8212
8313

[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,1,2,3,4,5,6,7,
 8,9,10,11,12,13,14,15,2,3,4,5,6,7,8,9,10,11,12,13,
 14,15,16,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,4,
 5,6,7,8,9,10,11,12,13,14,15,16,17,18,5,6,7,8,9,10,
 11,12,13]