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A286872 as a simple table

na(n)
21
35
41
58
61
715
81
96
101
1129
121
1327
141
155
161
1754
181
1960
201
216
221
2363
241
257
261
276
281
2954
301
3175
321
336
341
3512
361
3752
381
397
401
4176
421
4369
441
455
461
4774
481
4927
501
516
521
5378
541
5512
561
576
581
5997
601
6133
621
636
641
6515
661
6785
681
695
701
7199
721
7346
741
755
761
7715
781
7995
801
816
821
8356
841
8513
861
876
881
8982
901
9120
921
935

[1,5,1,8,1,15,1,6,1,29,1,27,1,5,1,54,1,60,1,6,1,
 63,1,7,1,6,1,54,1,75,1,6,1,12,1,52,1,7,1,76,1,69,
 1,5,1,74,1,27,1,6,1,78,1,12,1,6,1,97,1,33,1,6,1,
 15,1,85,1,5,1,99,1,46,1,5,1,15,1,95,1,6,1,56,1,13,
 1,6,1,82,1,20,1,5]