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 A057736 #19 Jun 06 2022 12:24:34 %S A057736 2,3,7,67 %N A057736 Primes p such that 2^p + 3 is prime. %C A057736 The next term p is greater than 100000, corresponding to a prime 2^p + 3 with more than 30000 digits. - _Ryan Propper_, Aug 24 2005 %C A057736 Next term > 2205444. - _Joerg Arndt_, Mar 07 2021 %D A057736 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 67, p. 24, Ellipses, Paris 2008. %t A057736 Select[Prime[Range[20]],PrimeQ[2^#+3]&] (* _Harvey P. Dale_, Jun 06 2022 *) %o A057736 (Python) %o A057736 from sympy import isprime, primerange %o A057736 def afind(limit): %o A057736 for p in primerange(2, limit+1): %o A057736 if isprime(2**p + 3): print(p, end=", ") %o A057736 afind(1000) # _Michael S. Branicky_, Mar 07 2021 %Y A057736 Cf. A057737 (the corresponding primes). %Y A057736 Subsequence of A057732. %K A057736 more,nonn %O A057736 1,1 %A A057736 _G. L. Honaker, Jr._, Oct 29 2000