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A111684 as a simple table

na(n)
12
22
33
43
54
64
75
85
96
106
117
128
138
149
159
1610
1710
1811
1911
2012
2112
2213
2313
2414
2515
2615
2716
2816
2917
3017
3118
3218
3319
3419
3520
3621
3721
3822
3922
4023
4123
4224
4324
4425
4525
4626
4726
4827
4928
5028
5129
5229
5330
5430
5531
5631
5732
5832
5933
6034
6134
6235
6335
6436
6536
6637
6737
6838
6938
7039
7139
7240
7341
7441

[2,2,3,3,4,4,5,5,6,6,7,8,8,9,9,10,10,11,11,12,12,
 13,13,14,15,15,16,16,17,17,18,18,19,19,20,21,21,
 22,22,23,23,24,24,25,25,26,26,27,28,28,29,29,30,
 30,31,31,32,32,33,34,34,35,35,36,36,37,37,38,38,
 39,39,40,41,41]