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 A079141 #13 Jan 15 2015 18:37:58 %S A079141 31,127,367,967,3727,6247,7927,11887,17167,22807,39607,72367,109567, %T A079141 160807,185767,323767,502687,737887,863047,885487,942847,982087, %U A079141 1079527,1560007,1739767,1852327,1985287,2105407,2343967,2399407 %N A079141 Primes of the form p^2 + 6 where p is prime. %C A079141 Sum of reciprocals = 0.0447155381... [4 additional digits from _Jon E. Schoenfield_, Jan 15 2015] %H A079141 T. D. Noe, <a href="/A079141/b079141.txt">Table of n, a(n) for n=1..1000</a> %t A079141 f[n_]:=n^2+6; lst={};Do[p=Prime[n];If[PrimeQ[f[p]],AppendTo[lst,f[p]]],{n,7!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jul 17 2009 *) %t A079141 Select[#^2+6&/@Prime[Range[300]],PrimeQ] (* _Harvey P. Dale_, Nov 16 2012 *) %o A079141 (PARI) sqppn(n) = {sr=0; forprime(x=3,n, y = x*x+6; if(isprime(y), print1(y" "); sr+=1.0/y; ); ); print(); print(sr); } \\ Primes of the form p^2 + 6 and the sum of the reciprocals. %Y A079141 Cf. A056909. %K A079141 easy,nonn %O A079141 1,1 %A A079141 _Cino Hilliard_, Dec 26 2002