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 A075704 #12 Feb 04 2024 01:14:28 %S A075704 3,5,13,19,23,29,31,59,61,71,73,83,89,101,103,139,149,191,199,223,229, %T A075704 233,269,271,281,293,311,379,383,401,409,433,463,479,503,523,569,601, %U A075704 631,643,661,691,719,751,761,773,811,829,839,863,883,929,953,1009,1013 %N A075704 p and 12*p+1 are both primes. %H A075704 Harvey P. Dale, <a href="/A075704/b075704.txt">Table of n, a(n) for n = 0..1000</a> %e A075704 5 is a prime and 12*5+1=61 is also a prime. 13 and 12*13+1=157 are both primes... %p A075704 ts_m_sophie_germain_pras := proc(n); if (isprime(n)='true' and isprime(12*n+1)='true') then RETURN(n); fi; end: seq(ts_m_sophie_germain_pras(i), i=1..2030); %t A075704 Select[Prime[Range[300]],PrimeQ[12#+1]&] (* _Harvey P. Dale_, Feb 06 2012 *) %Y A075704 Cf. A005384, A023212, A007693, A023228, A023237. %K A075704 nonn %O A075704 0,1 %A A075704 _Jani Melik_, Oct 02 2002