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A270310 as a simple table

na(n)
1139
2149
3181
4191
5241
6251
7283
8293
9337
10347
11409
12419
13421
14431
15547
16557
17577
18587
19631
20641
21691
22701
23709
24719
25787
26797
27811
28821
29829
30839
31887
32907
33919
34929
351021
361031
371039
381049
391051
401061
411153
421163
431171
441181
451249
461259
471399
481409
491471
501481
511627
521637
531657
541699
551709

[139,149,181,191,241,251,283,293,337,347,409,419,
 421,431,547,557,577,587,631,641,691,701,709,719,
 787,797,811,821,829,839,887,907,919,929,1021,1031,
 1039,1049,1051,1061,1153,1163,1171,1181,1249,1259,
 1399,1409,1471,1481,1627,1637,1657,1699,1709]