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A318978 as a simple table

na(n)
13
25
37
49
511
613
717
819
921
1023
1125
1227
1329
1431
1537
1639
1741
1843
1947
2049
2153
2257
2359
2461
2563
2665
2767
2871
2973
3079
3181
3283
3387
3489
3591
3697
37101
38103
39107
40109
41111
42113
43115
44117
45121
46125
47127
48129
49131
50133
51137
52139
53147
54149
55151
56157
57159
58163
59167
60169

[3,5,7,9,11,13,17,19,21,23,25,27,29,31,37,39,41,
 43,47,49,53,57,59,61,63,65,67,71,73,79,81,83,87,
 89,91,97,101,103,107,109,111,113,115,117,121,125,
 127,129,131,133,137,139,147,149,151,157,159,163,
 167,169]