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A115665 as a simple table

na(n)
14
26
39
415
549
6121
7143
8169
9187
10221
11289
12319
13323
14341
15437
16493
17533
18551
19559
20589
21629
22667
23737
24767
25781
26817
27851
28871
29893
30899
31913
32923
33949
34961
35979
36989
371027
381067
391079
401121
411219
421247
431273
441343
451357
461387
471411
481513
491577

[4,6,9,15,49,121,143,169,187,221,289,319,323,341,
 437,493,533,551,559,589,629,667,737,767,781,817,
 851,871,893,899,913,923,949,961,979,989,1027,1067,
 1079,1121,1219,1247,1273,1343,1357,1387,1411,1513,
 1577]