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A276717 as a simple table

na(n)
11
21
35
47
517
611
713
837
917
1019
1189
1219
1341
1471
1529
1613
1773
18199
1937
20157
2141
2243
2317
2447
25113
26433
2753
28541
29809
3059
3161
32997
3389
3467
351009
3671
3773
38113
39521
4079
411553
4283
431721
441693
4589
461873
471697
48107
4997
50313
51101
52103
53761
54107
55109
5611
57113
58239
591433
602269

[1,1,5,7,17,11,13,37,17,19,89,19,41,71,29,13,73,
 199,37,157,41,43,17,47,113,433,53,541,809,59,61,
 997,89,67,1009,71,73,113,521,79,1553,83,1721,1693,
 89,1873,1697,107,97,313,101,103,761,107,109,11,
 113,239,1433,2269]