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 A057469 #29 Jan 16 2024 16:33:07
%S A057469 3,7,11,83,149,223,599,647,1373,8423,149497,388897,531611,2052329
%N A057469 Prime numbers k such that (2^k + 3^k)/5 is prime.
%t A057469 Do[ If[ PrimeQ[ n ], If[ PrimeQ[ (3^n + 2^n)/5 ], Print[ n ] ] ], {n, 0, 6270} ]
%o A057469 (PARI) is(n)=isprime(n) && ispseudoprime((2^n + 3^n)/5) \\ _Charles R Greathouse IV_, Apr 28 2015
%o A057469 (Magma) [p: p in [3..1000] | IsPrime(p) and IsPrime((2^p + 3^p) div 5)]; // _Jinyuan Wang_, Dec 22 2019
%Y A057469 Cf. A127908 (primes of the form (3^k+2^k)/5).
%K A057469 nonn,more
%O A057469 1,1
%A A057469 _Robert G. Wilson v_, Sep 09 2000
%E A057469 More terms from Kamil Duszenko (kdusz(AT)wp.pl), Apr 11 2003
%E A057469 Definition corrected by _Alexander Adamchuk_, Feb 06 2007
%E A057469 a(11) corresponding to a probable prime with 71328 digits from _Jean-Louis Charton_, Oct 14 2010
%E A057469 a(12) corresponding to a probable prime with 185551 digits from _Jean-Louis Charton_, Sep 18 2011
%E A057469 a(13) corresponding to a probable prime with 253643 digits from _Ryan Propper_, Dec 10 2023
%E A057469 a(14) corresponding to a probable prime with 979210 digits from _Ryan Propper_, Dec 10 2023