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A118918 as a simple table

na(n)
15
27
311
419
529
661
771
879
989
10109
11151
12179
13181
14191
15199
16271
17281
18349
19379
20389
21421
22439
23479
24521
25541
26569
27631
28659
29691
30809
31821
32829
33839
34919
35971
361019
371051
381061
391069
401091
411289
421439
431511
441621
451699
461709
471789
481811
491871
502069
512141

[5,7,11,19,29,61,71,79,89,109,151,179,181,191,199,
 271,281,349,379,389,421,439,479,521,541,569,631,
 659,691,809,821,829,839,919,971,1019,1051,1061,
 1069,1091,1289,1439,1511,1621,1699,1709,1789,1811,
 1871,2069,2141]