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A253567 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1011
1112
1213
1315
1416
1517
1618
1719
1820
1921
2023
2124
2225
2327
2428
2529
2630
2731
2832
2935
3036
3137
3240
3341
3442
3543
3644
3745
3847
3948
4049
4150
4252
4353
4454
4555
4656
4759
4860
4961
5063
5164
5265
5366
5467
5568
5670
5771
5872
5973
6075
6176
6277
6378
6479
6580
6681
6783
6884
6985
7088
7189
7290
7391
7492
7595
7696
7797
7898
7999
80100

[1,2,3,4,5,6,7,8,9,11,12,13,15,16,17,18,19,20,21,
 23,24,25,27,28,29,30,31,32,35,36,37,40,41,42,43,
 44,45,47,48,49,50,52,53,54,55,56,59,60,61,63,64,
 65,66,67,68,70,71,72,73,75,76,77,78,79,80,81,83,
 84,85,88,89,90,91,92,95,96,97,98,99,100]