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A187681 as a simple table

na(n)
11
22
33
44
55
67
78
89
911
1012
1113
1215
1316
1417
1519
1620
1721
1823
1924
2025
2126
2227
2328
2430
2531
2632
2734
2835
2936
3038
3139
3240
3341
3442
3543
3645
3746
3847
3949
4050
4151
4253
4354
4455
4556
4657
4758
4860
4961
5062
5164
5265
5366
5468
5569
5670
5771
5872
5973
6075
6176
6277
6379
6480
6581
6683
6784
6885
6986
7087
7188
7290
7391
7492
7594
7695
7796
7898
7999
80100
81102
82103
83104
84106
85107
86108
87110
88111
89112
90113
91114
92115
93117
94118
95119
96121
97122

[1,2,3,4,5,7,8,9,11,12,13,15,16,17,19,20,21,23,24,
 25,26,27,28,30,31,32,34,35,36,38,39,40,41,42,43,
 45,46,47,49,50,51,53,54,55,56,57,58,60,61,62,64,
 65,66,68,69,70,71,72,73,75,76,77,79,80,81,83,84,
 85,86,87,88,90,91,92,94,95,96,98,99,100,102,103,
 104,106,107,108,110,111,112,113,114,115,117,118,
 119,121,122]