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A087875 as a simple table

na(n)
11
21
32
43
54
64
74
85
97
107
117
128
138
148
158
169
1712
1812
199
2010
2114
2214
2313
2413
2514
2615
2715
2816
2916
3016
3116
3217
3320
3421
3517
3617
3719
3823
3919
4021
4124
4224
4319
4420
4526
4626
4725
4825
4924
5025
5126
5227
5327
5427
5528
5628
5729
5829
5930
6030
6130
6231
6334
6434
6531
6632
6732
6832
6934
7038
7134
7236
7335
7439
7537

[1,1,2,3,4,4,4,5,7,7,7,8,8,8,8,9,12,12,9,10,14,14,
 13,13,14,15,15,16,16,16,16,17,20,21,17,17,19,23,
 19,21,24,24,19,20,26,26,25,25,24,25,26,27,27,27,
 28,28,29,29,30,30,30,31,34,34,31,32,32,32,34,38,
 34,36,35,39,37]