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A025660 as a simple table

na(n)
10
21
30
42
51
60
73
82
91
100
114
123
132
141
150
165
174
183
192
201
210
226
235
244
253
262
271
280
297
306
315
324
333
342
351
360
378
387
396
405
414
423
432
441
450
469
478
487
496
505
514
523
532
541
550
5610
579
588
597
606
615
624
633
642
651
660
6711
6810
699
708
717
726
735
744
753
762
771
780
7912
8011
8110
829
838
847
856
865
874
883
892
901
9113
920
9312
9411
9510
969
978
987
996
1005
1014
1023

[0,1,0,2,1,0,3,2,1,0,4,3,2,1,0,5,4,3,2,1,0,6,5,4,
 3,2,1,0,7,6,5,4,3,2,1,0,8,7,6,5,4,3,2,1,0,9,8,7,6,
 5,4,3,2,1,0,10,9,8,7,6,5,4,3,2,1,0,11,10,9,8,7,6,
 5,4,3,2,1,0,12,11,10,9,8,7,6,5,4,3,2,1,13,0,12,11,
 10,9,8,7,6,5,4,3]