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A231557 as a simple table

na(n)
11
21
32
41
52
61
74
83
92
101
112
121
136
143
152
161
172
181
194
205
212
221
238
243
254
263
272
281
292
301
314
323
338
345
352
361
3710
383
392
401
412
421
436
445
452
461
474
483
494
5011
512
521
5320
543
554
563
572
581
592
601
614
623
638
6413
652
661
674
683
692
701
712
721
736
743
7512
765
772
781
796
805
812
821
838
843
854
865
872
881
894
907
914
923
936
9411
952
961
974
983
992
1001

[1,1,2,1,2,1,4,3,2,1,2,1,6,3,2,1,2,1,4,5,2,1,8,3,
 4,3,2,1,2,1,4,3,8,5,2,1,10,3,2,1,2,1,6,5,2,1,4,3,
 4,11,2,1,20,3,4,3,2,1,2,1,4,3,8,13,2,1,4,3,2,1,2,
 1,6,3,12,5,2,1,6,5,2,1,8,3,4,5,2,1,4,7,4,3,6,11,2,
 1,4,3,2,1]