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A137671 as a simple table

na(n)
11
21
32
43
51
64
75
82
96
103
114
127
131
148
159
165
176
187
192
2010
218
2211
233
249
2510
2611
274
2812
2912
3013
315
3214
336
3415
351
3613
377
388
3914
409
4116
4215
432
4416
4517
4617
4718
4819
4910
5020
5121
5211
5312
5422
5513
5614
5715
583
5923
604
6118
6224
6325
6416
6519
6617
6726
6818
6927
705
7128
7219
7320
7429
756
7630
777
7821
7922
8023
818

[1,1,2,3,1,4,5,2,6,3,4,7,1,8,9,5,6,7,2,10,8,11,3,
 9,10,11,4,12,12,13,5,14,6,15,1,13,7,8,14,9,16,15,
 2,16,17,17,18,19,10,20,21,11,12,22,13,14,15,3,23,
 4,18,24,25,16,19,17,26,18,27,5,28,19,20,29,6,30,7,
 21,22,23,8]