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A124981 as a simple table

na(n)
13
27
311
415
519
621
723
827
931
1033
1135
1239
1343
1447
1551
1655
1757
1859
1963
2067
2169
2271
2375
2477
2579
2683
2787
2891
2993
3095
3199
32103
33105
34107
35111
36115
37119
38123
39127
40129
41131
42133
43135
44139
45141
46143
47147
48151
49155
50159
51161
52163
53165
54167
55171
56175
57177
58179
59183
60187

[3,7,11,15,19,21,23,27,31,33,35,39,43,47,51,55,57,
 59,63,67,69,71,75,77,79,83,87,91,93,95,99,103,105,
 107,111,115,119,123,127,129,131,133,135,139,141,
 143,147,151,155,159,161,163,165,167,171,175,177,
 179,183,187]