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A274720 as a simple table

na(n)
19
221
325
427
539
645
749
855
957
1063
1175
1281
1399
14105
15111
16117
17121
18125
19135
20147
21153
22155
23165
24169
25171
26175
27183
28189
29195
30201
31203
32205
33207
34219
35225
36231
37237
38243
39245
40253
41261
42273
43275
44279
45285
46289
47291
48297
49301
50305
51309
52315
53325
54327

[9,21,25,27,39,45,49,55,57,63,75,81,99,105,111,
 117,121,125,135,147,153,155,165,169,171,175,183,
 189,195,201,203,205,207,219,225,231,237,243,245,
 253,261,273,275,279,285,289,291,297,301,305,309,
 315,325,327]