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A206770 as a simple table

na(n)
15
27
311
411
513
617
717
819
923
1023
1129
1229
1321
1431
1537
1637
1737
1841
1928
2033
2147
2247
2353
2453
2553
2659
2759
2844
2961
3067
3167
3267
3371
3457
3573
3679
3779
3879
3983
4083
4169
4289
4374
44101
4568
4697
4797
4885
49101
50103
51107
52107
53109
54113
5593
56131
57127
58127
59131
60127
61127
62127

[5,7,11,11,13,17,17,19,23,23,29,29,21,31,37,37,37,
 41,28,33,47,47,53,53,53,59,59,44,61,67,67,67,71,
 57,73,79,79,79,83,83,69,89,74,101,68,97,97,85,101,
 103,107,107,109,113,93,131,127,127,131,127,127,
 127]