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A103654 as a simple table

na(n)
15
253
367
489
5113
6131
7173
8211
9251
10293
11307
12337
13379
14409
15449
16487
17491
18499
19631
20683
21701
22727
23751
24769
25787
26919
27941
28953
29991
301009
311039
321051
331063
341117
351193
361259
371399
381459
391471
401499
411511
421567
431627
441697
451709
461733
471759
481787
491801

[5,53,67,89,113,131,173,211,251,293,307,337,379,
 409,449,487,491,499,631,683,701,727,751,769,787,
 919,941,953,991,1009,1039,1051,1063,1117,1193,
 1259,1399,1459,1471,1499,1511,1567,1627,1697,1709,
 1733,1759,1787,1801]