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A331368 as a simple table

na(n)
11
21
31
41
51
62
71
81
93
101
111
121
131
141
152
161
171
181
192
205
213
221
233
241
252
265
271
284
291
301
311
324
331
346
351
363
372
385
391
403
413
422
435
441
451
461
471
481
495
501
513
522
532
547
555
563
574
583
592
606
613
623
631
645
654
663
671
685
691
702
716
7211
731
749
754
765
771
783
792
803
811
824
832
841
854
864
872
881
8913
902
918
922
937

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