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A051777 as a simple table

na(n)
10
20
30
40
51
60
70
81
90
100
110
121
132
141
150
160
171
182
190
200
210
220
231
242
253
261
271
280
290
301
312
323
330
342
350
360
370
381
392
403
414
421
430
441
450
460
471
482
493
504
510
522
531
540
550
560
571
582
593
604
615
621
633
642
651
660
670
681
692
703
714
725
730
742
750
760
770
780
790
801
812
823
834
845
856
861
873
881
891
901
910
920
931
942
953
964
975
986
990
1002
1014
1022
1032
1040
1050

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