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A010881 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1111
120
131
142
153
164
175
186
197
208
219
2210
2311
240
251
262
273
284
295
306
317
328
339
3410
3511
360
371
382
393
404
415
426
437
448
459
4610
4711
480
491
502
513
524
535
546
557
568
579
5810
5911
600
611
622
633
644
655
666
677
688
699
7010
7111
720
731
742
753
764
775
786
797
808
819
8210
8311

[0,1,2,3,4,5,6,7,8,9,10,11,0,1,2,3,4,5,6,7,8,9,10,
 11,0,1,2,3,4,5,6,7,8,9,10,11,0,1,2,3,4,5,6,7,8,9,
 10,11,0,1,2,3,4,5,6,7,8,9,10,11,0,1,2,3,4,5,6,7,8,
 9,10,11,0,1,2,3,4,5,6,7,8,9,10,11]