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A040978 as a simple table

na(n)
12
23
35
47
513
617
719
823
929
1037
1143
1247
1353
1459
1567
1673
1779
1883
1989
2097
21101
22103
23107
24109
25113
26127
27137
28139
29149
30157
31163
32167
33173
34179
35181
36193
37197
38199
39223
40227
41229
42233
43239
44257
45263
46269
47277
48283

[2,3,5,7,13,17,19,23,29,37,43,47,53,59,67,73,79,
 83,89,97,101,103,107,109,113,127,137,139,149,157,
 163,167,173,179,181,193,197,199,223,227,229,233,
 239,257,263,269,277,283]