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A046282 as a simple table

na(n)
13
231
337
4173
5179
6293
7353
8383
9389
10397
11409
12467
13491
14547
15691
16733
17761
18829
19883
20911
21953
22967
231129
241259
251279
261291
271307
281319
291373
301399
311433
321447
331459
341531
351543
361607
371627
381669
391693
401697
411709
421777
431787
441811
451871
461907

[3,31,37,173,179,293,353,383,389,397,409,467,491,
 547,691,733,761,829,883,911,953,967,1129,1259,
 1279,1291,1307,1319,1373,1399,1433,1447,1459,1531,
 1543,1607,1627,1669,1693,1697,1709,1777,1787,1811,
 1871,1907]