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A249419 as a simple table

na(n)
12
27
313
419
531
637
783
8131
967
10317
11277
12109
13367
14127
15139
16157
17293
18181
19199
20211
21509
22709
23911
24443
25677
26503
27307
282459
29761
30337
31379
32653
33409
34971
35743
363169
371097
38487
39499
40863
411609
42541
43571
44577
45983
461789
47631
481559
496581
501601
511163
521193
533613
54751
55769
56787
572957

[2,7,13,19,31,37,83,131,67,317,277,109,367,127,
 139,157,293,181,199,211,509,709,911,443,677,503,
 307,2459,761,337,379,653,409,971,743,3169,1097,
 487,499,863,1609,541,571,577,983,1789,631,1559,
 6581,1601,1163,1193,3613,751,769,787,2957]