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A260688 as a simple table

na(n)
00
11
22
33
44
51
62
73
84
95
101
112
123
134
145
152
163
174
185
196
202
213
224
235
246
251
262
273
284
295
302
313
324
335
346
352
363
374
385
396
403
414
425
436
447
453
464
475
486
497
502
513
524
535
546
553
564
575
586
597
603
614
625
636
647
654
665
676
687
698
704
715
726
737
748
753
764
775
786
797
804
815
826
837
848
854
865
876
887
898
905
916
927
938
949
955
966
977
988
999

[0,1,2,3,4,1,2,3,4,5,1,2,3,4,5,2,3,4,5,6,2,3,4,5,
 6,1,2,3,4,5,2,3,4,5,6,2,3,4,5,6,3,4,5,6,7,3,4,5,6,
 7,2,3,4,5,6,3,4,5,6,7,3,4,5,6,7,4,5,6,7,8,4,5,6,7,
 8,3,4,5,6,7,4,5,6,7,8,4,5,6,7,8,5,6,7,8,9,5,6,7,8,
 9]