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A256990 as a simple table

na(n)
10
21
31
41
52
63
71
82
94
103
111
125
136
147
152
164
178
183
191
209
2110
225
236
2411
257
262
2712
2813
2914
3015
314
328
3316
343
351
3617
3718
389
3910
4019
415
426
4320
4421
4522
4611
477
4823
492
5012
5124
5225
5313
5414
5526
5615
574
5827
5928
6029
6130
6231
638
6416
6532
663
671
6833
6934
7017
7118
7235
739
7410
7536
7637
7738
7819
795
8039
816
8220
8340
8441
8521
8622
8742
8811
897

[0,1,1,1,2,3,1,2,4,3,1,5,6,7,2,4,8,3,1,9,10,5,6,
 11,7,2,12,13,14,15,4,8,16,3,1,17,18,9,10,19,5,6,
 20,21,22,11,7,23,2,12,24,25,13,14,26,15,4,27,28,
 29,30,31,8,16,32,3,1,33,34,17,18,35,9,10,36,37,38,
 19,5,39,6,20,40,41,21,22,42,11,7]