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A076546 as a simple table

na(n)
15
27
311
45
57
611
713
817
923
1023
1131
1231
1337
1441
1547
1653
1753
1861
1961
2067
2173
2273
2383
2489
2589
2697
27101
28103
29107
30113
31113
32131
33131
34139
35139
36151
37157
38157
39167
40173
41173
42181
43181
44191
45193
46199
47211
48211
49223
50227
51233
52233
53241
54251
55257
56263
57263
58271
59271
60277

[5,7,11,5,7,11,13,17,23,23,31,31,37,41,47,53,53,
 61,61,67,73,73,83,89,89,97,101,103,107,113,113,
 131,131,139,139,151,157,157,167,173,173,181,181,
 191,193,199,211,211,223,227,233,233,241,251,257,
 263,263,271,271,277]