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A284621 as a simple table

na(n)
11
25
311
415
521
627
731
837
941
1047
1153
1257
1363
1469
1573
1679
1783
1889
1995
2099
21105
22109
23115
24121
25125
26131
27137
28141
29147
30151
31157
32163
33167
34173
35179
36183
37189
38193
39199
40205
41209
42215
43219
44225
45231
46235
47241
48247
49251
50257
51261
52267
53273
54277
55283
56287

[1,5,11,15,21,27,31,37,41,47,53,57,63,69,73,79,83,
 89,95,99,105,109,115,121,125,131,137,141,147,151,
 157,163,167,173,179,183,189,193,199,205,209,215,
 219,225,231,235,241,247,251,257,261,267,273,277,
 283,287]