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A161973 as a simple table

na(n)
13
27
33
47
53
65
73
85
92
107
113
123
133
143
157
165
173
1813
1911
203
217
223
233
245
255
2613
277
285
292
3011
3113
322
335
3417
3513
367
373
387
393
407
4119
427
435
443
453
4613
473
487
497
503
5111
523
5319
5411
5517
563
573
585
595
605
617
625
6317
645
6517
667
6711
6819
695
7017
7113
7219
7313
7411
757
763
777
782
7911
803
813
823
837
8413
855
863
8713
882
893
907
913
9211
937

[3,7,3,7,3,5,3,5,2,7,3,3,3,3,7,5,3,13,11,3,7,3,3,
 5,5,13,7,5,2,11,13,2,5,17,13,7,3,7,3,7,19,7,5,3,3,
 13,3,7,7,3,11,3,19,11,17,3,3,5,5,5,7,5,17,5,17,7,
 11,19,5,17,13,19,13,11,7,3,7,2,11,3,3,3,7,13,5,3,
 13,2,3,7,3,11,7]