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A317847 as a simple table

na(n)
11
21
31
47
51
65
71
89
97
105
111
1215
131
145
151
1643
171
1815
191
207
213
223
231
245
253
265
279
2815
291
309
311
3287
333
345
351
361
371
385
393
4013
411
4211
431
4411
4515
463
471
48187
497
5019
511
5215
531
545
553
5621
573
583
591
60-1
611
623
6311
64387
651
669
671
687
691
7013
711
72119
731
747
7519
7623
773
7819
791
80139
81-21
827
831
8421
851
865
871
8839
891
9067
913
923
935
943
955
96451
971
9815
9919
10069
1011
10213
1031
104-27
1057

[1,1,1,7,1,5,1,9,7,5,1,15,1,5,1,43,1,15,1,7,3,3,1,
 5,3,5,9,15,1,9,1,87,3,5,1,1,1,5,3,13,1,11,1,11,15,
 3,1,187,7,19,1,15,1,5,3,21,3,3,1,-1,1,3,11,387,1,
 9,1,7,1,13,1,119,1,7,19,23,3,19,1,139,-21,7,1,21,
 1,5,1,39,1,67,3,3,5,3,5,451,1,15,19,69,1,13,1,-27,
 7]