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A007456 as a simple table

na(n)
10
21
33
42
54
63
74
83
95
104
115
124
135
144
155
164
176
185
196
205
216
225
236
245
256
265
276
285
296
305
316
325
337
346
357
366
377
386
397
406
417
426
437
446
457
466
477
486
497
506
517
526
537
546
557
566
577
586
597
606
617
626
637
646
658
667
678
687
698
707
718
727
738
747
758
767
778
787
798
807
818
827
838
847
858
867
878

[0,1,3,2,4,3,4,3,5,4,5,4,5,4,5,4,6,5,6,5,6,5,6,5,
 6,5,6,5,6,5,6,5,7,6,7,6,7,6,7,6,7,6,7,6,7,6,7,6,7,
 6,7,6,7,6,7,6,7,6,7,6,7,6,7,6,8,7,8,7,8,7,8,7,8,7,
 8,7,8,7,8,7,8,7,8,7,8,7,8]