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A087718 as a simple table

na(n)
14
26
39
415
525
635
749
877
991
10121
11143
12169
13187
14209
15221
16247
17289
18299
19323
20361
21391
22437
23493
24527
25529
26551
27589
28667
29703
30713
31841
32851
33899
34943
35961
36989
371073
381147
391189
401247
411271
421333
431363
441369
451457
461517
471537
481591
491643
501681

[4,6,9,15,25,35,49,77,91,121,143,169,187,209,221,
 247,289,299,323,361,391,437,493,527,529,551,589,
 667,703,713,841,851,899,943,961,989,1073,1147,
 1189,1247,1271,1333,1363,1369,1457,1517,1537,1591,
 1643,1681]