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A285100 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1213
1314
1415
1516
1617
1719
1820
1921
2022
2123
2225
2326
2427
2528
2629
2730
2831
2932
3033
3134
3235
3337
3438
3539
3641
3742
3843
3944
4046
4147
4249
4351
4452
4553
4655
4757
4858
4959
5061
5162
5264
5365
5466
5567
5668
5769
5870
5971
6073
6174
6276
6377
6478
6579
6681
6782
6883
6985
7086
7187
7288
7389
7491
7592
7693
7794
7895
7997
8099
81101

[1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,19,20,21,
 22,23,25,26,27,28,29,30,31,32,33,34,35,37,38,39,
 41,42,43,44,46,47,49,51,52,53,55,57,58,59,61,62,
 64,65,66,67,68,69,70,71,73,74,76,77,78,79,81,82,
 83,85,86,87,88,89,91,92,93,94,95,97,99,101]