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A279864 as a simple table

na(n)
12
23
35
425
57
649
777
891
9119
10133
11161
12203
1311
14121
15143
16187
17209
18253
19319
20341
21407
22451
23473
24517
25583
26649
27671
28737
29781
30803
31869
32913
33979
341067
351111
361133
371177
381199
391243
401331
411397
421441
431507
441529
451573
461639
471661
481727
491793
501837
511859

[2,3,5,25,7,49,77,91,119,133,161,203,11,121,143,
 187,209,253,319,341,407,451,473,517,583,649,671,
 737,781,803,869,913,979,1067,1111,1133,1177,1199,
 1243,1331,1397,1441,1507,1529,1573,1639,1661,1727,
 1793,1837,1859]