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A251728 as a simple table

na(n)
14
26
39
415
521
625
735
849
955
1065
1177
1285
1391
1495
15115
16119
17121
18133
19143
20161
21169
22187
23203
24209
25217
26221
27247
28253
29259
30287
31289
32299
33301
34319
35323
36329
37341
38361
39377
40391
41403
42407
43437
44451
45473
46481
47493
48517
49527
50529
51533
52551
53559
54583
55589
56611
57629
58649
59667
60671
61689
62697
63703

[4,6,9,15,21,25,35,49,55,65,77,85,91,95,115,119,
 121,133,143,161,169,187,203,209,217,221,247,253,
 259,287,289,299,301,319,323,329,341,361,377,391,
 403,407,437,451,473,481,493,517,527,529,533,551,
 559,583,589,611,629,649,667,671,689,697,703]