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A271519 as a simple table

na(n)
10
21
31
42
52
62
73
83
94
103
115
123
136
144
157
164
178
185
199
204
2110
226
2311
244
2512
267
2713
285
2914
308
3115
325
3316
349
3517
366
3718
3810
3919
405
4120
4211
4321
447
4522
4612
4723
485
4924
5013
5125
528
5326
5414
5527
566
5728
5815
5929
609
6130
6216
6331
646

[0,1,1,2,2,2,3,3,4,3,5,3,6,4,7,4,8,5,9,4,10,6,11,
 4,12,7,13,5,14,8,15,5,16,9,17,6,18,10,19,5,20,11,
 21,7,22,12,23,5,24,13,25,8,26,14,27,6,28,15,29,9,
 30,16,31,6]