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A173541 as a simple table

na(n)
10
20
30
40
52
60
70
80
93
100
110
122
133
144
150
160
170
180
194
205
210
220
232
243
254
265
276
280
290
300
313
320
335
346
357
360
370
382
390
404
415
426
437
448
450
460
470
483
494
500
516
527
538
549
550
560
572
583
594
605
616
627
638
649
6510
660
670
680
690
700
715
720
737
748
759
7610
7711
780
790
802
813
824
835
846
857
868
879
8810
8911
9012
910
920
930
943
954
965
976
980
998
1009
10110
10211

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