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A355221 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1111
1211
1311
1411
1511
1611
1711
1811
1911
2020
2121
2222
2322
2422
2522
2622
2722
2822
2922
3030
3131
3232
3333
3433
3533
3633
3733
3833
3933
4040
4141
4242
4343
4444
4544
4644
4744
4844
4944
5050
5151
5252
5353
5454
5555
5655
5755
5855
5955
6060
6161
6262
6363
6464
6565
6666
6766

[0,1,2,3,4,5,6,7,8,9,10,11,11,11,11,11,11,11,11,
 11,20,21,22,22,22,22,22,22,22,22,30,31,32,33,33,
 33,33,33,33,33,40,41,42,43,44,44,44,44,44,44,50,
 51,52,53,54,55,55,55,55,55,60,61,62,63,64,65,66,
 66]