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A068419 as a simple table

na(n)
15
211
37
423
511
647
779
873
967
1023
11191
12283
13383
14739
1547
161459
17281
18607
1959
201153
211069
223319
2383
241801
252671
263517
27743
28107
296679
303529
316619
326143
336271
344153
3510169
369817
37167
386451
39179
4024097
4123539
4210369
43227
44263
4516369
4641203
4720809
4854919

[5,11,7,23,11,47,79,73,67,23,191,283,383,739,47,
 1459,281,607,59,1153,1069,3319,83,1801,2671,3517,
 743,107,6679,3529,6619,6143,6271,4153,10169,9817,
 167,6451,179,24097,23539,10369,227,263,16369,
 41203,20809,54919]