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A217780 as a simple table

na(n)
11
21
31
43
51
64
71
81
93
106
111
122
133
141
154
168
171
183
193
202
214
221
236
241
252
2611
271
285
293
303
314
322
336
343
352
361
378
3813
391
408
413
424
434
443
456
465
472
482
498
501
5111
521
535
5416
551
5610
573
586
594
604
616
627
632
644
658
662
6711
683
695
701
7113
7218
731
7412
753
769
774
786
796
809
812
825
838
843
8511
864
875
882
8913
901
9116
921
9310
941
957

[1,1,1,3,1,4,1,1,3,6,1,2,3,1,4,8,1,3,3,2,4,1,6,1,
 2,11,1,5,3,3,4,2,6,3,2,1,8,13,1,8,3,4,4,3,6,5,2,2,
 8,1,11,1,5,16,1,10,3,6,4,4,6,7,2,4,8,2,11,3,5,1,
 13,18,1,12,3,9,4,6,6,9,2,5,8,3,11,4,5,2,13,1,16,1,
 10,1,7]