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A178042 as a simple table

na(n)
01
12
23
33
43
54
64
75
84
94
105
115
125
134
145
155
166
176
186
196
205
215
226
235
246
257
265
275
287
296
307
316
326
336
346
356
366
376
386
396
405
416
427
438
447
457
467
477
487
496
507
516
527
537
547
557
566
577
588
597
607
617
627
637
647
657
666
677
686
698
708
717
727
738
748
757
768
777
787
797
806
816
828
837
847
857
868
878
888
897
907
917
928
938
947
958
968
978
987
998
1008

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