This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A275770 #25 Oct 05 2016 15:21:38 %S A275770 17,47,59,71,101,107,137,149,167,197,227,257,263,269,311,317,347,353, %T A275770 383,389,401,449,461,467,479,503,521,557,563,569,587,599,617,647,677, %U A275770 701,773,797,821,827,839,857,863,881,887,929,941,947,971,977,983,1061,1091,1097 %N A275770 Primes p == 5 (mod 6) that are not Sophie Germain primes. %F A275770 Subset of A156543 and subset of A045979 %F A275770 Intersection of A007528 and A053176. - _Felix Fröhlich_, Aug 08 2016 %t A275770 Select[Prime[Range[150]], Mod[#, 6] == 5 && \[Not] PrimeQ[2 # + 1] &] %o A275770 (PARI) forprime(p=1, 900, if(Mod(p, 6)==5 && !ispseudoprime(2*p+1), print1(p, ", "))) \\ _Felix Fröhlich_, Aug 08 2016 %Y A275770 Cf. A005384, A007528, A045979, A053176, A156543. %K A275770 nonn %O A275770 1,1 %A A275770 _Hilko Koning_, Aug 08 2016