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A277895 as a simple table

na(n)
20
31
42
51
63
71
84
92
105
111
123
131
144
155
166
171
186
191
207
218
227
231
248
252
269
2710
2811
291
309
311
3210
333
3412
354
3613
371
3814
3915
4011
411
4212
431
445
456
4613
471
4816
492
5017
517
5218
531
5414
558
5615
579
583
591
6010
611
6211
6312
6419
654
6616
671
6813
6914
7017
711
7218
731
7420
7521
7615
775
7822
791
8016
8117
8223
831
8418
8519
8624
8725
8819
891
9026
916
9220
932
9421
957
9620
971
9821
9922
10027
1011

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