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A123123 as a simple table

na(n)
15
26
37
49
513
615
719
821
925
1031
1133
1239
1343
1445
1549
1655
1761
1863
1969
2073
2175
2281
2385
2491
2599
26103
27105
28109
29111
30115
31129
32133
33139
34141
35151
36153
37159
38165
39169
40175
41181
42183
43193
44195
45199
46201
47213
48225
49229
50231
51235
52241
53243
54253
55259
56265
57271
58273
59279

[5,6,7,9,13,15,19,21,25,31,33,39,43,45,49,55,61,
 63,69,73,75,81,85,91,99,103,105,109,111,115,129,
 133,139,141,151,153,159,165,169,175,181,183,193,
 195,199,201,213,225,229,231,235,241,243,253,259,
 265,271,273,279]