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 A207837 #22 Dec 08 2023 06:27:02 %S A207837 6481,103681,844480081,1036800001,55099802881,63727534081, %T A207837 115672050001,155584800001,307529920081,322620641281,425152800001, %U A207837 1019640545281,1633266996481,1739461754881,2489356800001,2634683086081,2944329626881,5285935072081,6360160441681 %N A207837 Primes of the form 5*k^4 + 1. %C A207837 Also primes of the form 6480*k^4+1. %H A207837 Vincenzo Librandi, <a href="/A207837/b207837.txt">Table of n, a(n) for n = 1..1500</a> %F A207837 a(n) = 5*A207838(n)^4 + 1. - _Paul F. Marrero Romero_, Dec 07 2023 %t A207837 Select[5 Range[1086]^4 + 1, PrimeQ] (* by definition *) %o A207837 (PARI) for(n=1, 181, r=6480*n^4+1; if(isprime(r), print1(r", "))); %o A207837 (Magma) [6480*n^4+1: n in [1..181] | IsPrime(6480*n^4+1)]; %Y A207837 Cf. A207838 (values of k). %Y A207837 Subsequence of A137530. %Y A207837 Primes of the form k*n^(k-1)+1: A065091, A002648, A199307. %K A207837 nonn,easy %O A207837 1,1 %A A207837 _Bruno Berselli_, Feb 21 2012