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A284290 as a simple table

na(n)
141
243
347
4149
5241
6347
7349
8401
9409
10419
11421
12431
13433
14439
15443
16449
17457
18461
19463
20467
21479
22487
23491
24499
25541
26547
27641
28643
29647
30743
31941
32947
331049
341249
351409
361423
371427
381429
391433
401439
411447
421451
431453
441459
451471
461481
471483
481487
491489

[41,43,47,149,241,347,349,401,409,419,421,431,433,
 439,443,449,457,461,463,467,479,487,491,499,541,
 547,641,643,647,743,941,947,1049,1249,1409,1423,
 1427,1429,1433,1439,1447,1451,1453,1459,1471,1481,
 1483,1487,1489]