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A216880 as a simple table

na(n)
14
27
313
419
531
637
749
867
9109
10139
11181
12217
13247
14301
15307
16319
17391
18409
19451
20517
21541
22697
23721
24769
25787
26811
27829
28847
29877
30931
31937
32991
331039
341099
351117
361189
371327
381381
391399
401507
411669
421729
431777
441801
451819
461921
471957
481981
492047
502179
512251
522281

[4,7,13,19,31,37,49,67,109,139,181,217,247,301,
 307,319,391,409,451,517,541,697,721,769,787,811,
 829,847,877,931,937,991,1039,1099,1117,1189,1327,
 1381,1399,1507,1669,1729,1777,1801,1819,1921,1957,
 1981,2047,2179,2251,2281]