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A331175 as a simple table

na(n)
11
21
31
42
51
62
71
83
93
102
111
124
131
142
151
164
171
185
191
203
213
222
231
246
254
262
277
284
291
302
311
325
331
342
351
368
371
382
393
405
411
425
431
443
453
462
471
489
496
506
511
524
531
5410
554
567
573
582
591
604
611
622
638
646
651
662
671
683
691
702
711
7211
731
742
755
764
771
785
791
807
8112
822
831
849
851
862
871
885
891
906
911
923
933
942
951
9613
971
9810
993
1008
1011
1022
1031
1046
1053

[1,1,1,2,1,2,1,3,3,2,1,4,1,2,1,4,1,5,1,3,3,2,1,6,
 4,2,7,4,1,2,1,5,1,2,1,8,1,2,3,5,1,5,1,3,3,2,1,9,6,
 6,1,4,1,10,4,7,3,2,1,4,1,2,8,6,1,2,1,3,1,2,1,11,1,
 2,5,4,1,5,1,7,12,2,1,9,1,2,1,5,1,6,1,3,3,2,1,13,1,
 10,3,8,1,2,1,6,3]