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 A378134 #15 Dec 03 2024 12:42:20 %S A378134 2,2,2,2,37,281,137,2129,139,23,1231,1279,17477 %N A378134 a(n) is the smallest prime p such that (2*p)^(2^n) + 1 is also prime. %Y A378134 Primes p such that (2*p)^(2^k) + 1 is prime: A005384 (k = 0), A052291 (k = 1), A378146 (k = 2). %Y A378134 If a(n) is the smallest prime number p such that (p*2^m)^(2^n) + 1, then we have: %Y A378134 2, 2, 2, 2, 2 (in case m = 0), where primes of the form (p*2^0)^(2^n)+1 are A019434; %Y A378134 this sequence (in case m = 1). %Y A378134 Cf. A378143. %K A378134 nonn,more %O A378134 0,1 %A A378134 _Juri-Stepan Gerasimov_, Nov 17 2024 %E A378134 a(11)-a(12) from _Michael S. Branicky_, Nov 18 2024