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A273005 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
102
113
124
135
146
157
168
179
1810
1911
203
214
225
236
247
258
269
2710
2811
2912
304
315
326
337
348
359
3610
3711
3812
3913
405
416
427
438
449
4510
4611
4712
4813
4914
506
517
528
539
5410
5511
5612
5713
5814
5915
607
618
629
6310
6411
6512
6613
6714
6815
6916
708
719
7210
7311
7412
7513
7614
7715
7816
7917
809
8110
8211
8312
8413
8514
8615
8716
8817
8918
9010
9111
9212
9313
9414
9515
9616
9717
9818
9919
1003

[0,1,2,3,4,5,6,7,8,9,2,3,4,5,6,7,8,9,10,11,3,4,5,
 6,7,8,9,10,11,12,4,5,6,7,8,9,10,11,12,13,5,6,7,8,
 9,10,11,12,13,14,6,7,8,9,10,11,12,13,14,15,7,8,9,
 10,11,12,13,14,15,16,8,9,10,11,12,13,14,15,16,17,
 9,10,11,12,13,14,15,16,17,18,10,11,12,13,14,15,16,
 17,18,19,3]