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A056992 as a simple table

na(n)
11
24
39
47
57
69
74
81
99
101
114
129
137
147
159
164
171
189
191
204
219
227
237
249
254
261
279
281
294
309
317
327
339
344
351
369
371
384
399
407
417
429
434
441
459
461
474
489
497
507
519
524
531
549
551
564
579
587
597
609
614
621
639
641
654
669
677
687
699
704
711
729
731
744
759
767
777
789
794
801
819
821
834
849
857
867
879

[1,4,9,7,7,9,4,1,9,1,4,9,7,7,9,4,1,9,1,4,9,7,7,9,
 4,1,9,1,4,9,7,7,9,4,1,9,1,4,9,7,7,9,4,1,9,1,4,9,7,
 7,9,4,1,9,1,4,9,7,7,9,4,1,9,1,4,9,7,7,9,4,1,9,1,4,
 9,7,7,9,4,1,9,1,4,9,7,7,9]