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A165580 as a simple table

na(n)
13
27
323
431
547
671
779
8151
9167
10191
11199
12239
13263
14271
15311
16359
17383
18431
19439
20479
21503
22599
23647
24719
25743
26751
27839
28863
29887
30911
31919
32983
33991
341031
351039
361151
371223
381231
391279
401319
411399
421439
431471
441487
451511
461559
471583
481759

[3,7,23,31,47,71,79,151,167,191,199,239,263,271,
 311,359,383,431,439,479,503,599,647,719,743,751,
 839,863,887,911,919,983,991,1031,1039,1151,1223,
 1231,1279,1319,1399,1439,1471,1487,1511,1559,1583,
 1759]