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A066868 as a simple table

na(n)
12
21
310
45
52
61
72
81
912
105
112
121
134
141
154
165
172
181
192
203
214
227
2312
241
252
261
274
287
292
303
312
321
334
345
352
361
374
381
396
4017
412
421
434
443
456
465
472
481
492
503
514
5211
5312
541
552
561
574
585
592
603
612
621
634
645
6514
661
672
681
6910
705
712
727
7310
741
756
767
772
781
798
803
814
827
8326
841

[2,1,10,5,2,1,2,1,12,5,2,1,4,1,4,5,2,1,2,3,4,7,12,
 1,2,1,4,7,2,3,2,1,4,5,2,1,4,1,6,17,2,1,4,3,6,5,2,
 1,2,3,4,11,12,1,2,1,4,5,2,3,2,1,4,5,14,1,2,1,10,5,
 2,7,10,1,6,7,2,1,8,3,4,7,26,1]