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A113220 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1011
1110
1213
1312
1415
1514
1617
1716
1819
1921
2018
2123
2220
2325
2422
2527
2624
2729
2831
2926
3033
3128
3235
3330
3437
3532
3639
3741
3834
3943
4036
4145
4238
4347
4440
4549
4651
4742
4853
4944
5055
5146
5257
5348
5459
5561
5650
5763
5852
5965
6054
6167
6256
6369
6471
6558
6673
6760
6875
6962
7077
7164
7279

[0,1,2,3,4,5,6,7,8,9,11,10,13,12,15,14,17,16,19,
 21,18,23,20,25,22,27,24,29,31,26,33,28,35,30,37,
 32,39,41,34,43,36,45,38,47,40,49,51,42,53,44,55,
 46,57,48,59,61,50,63,52,65,54,67,56,69,71,58,73,
 60,75,62,77,64,79]