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 A237191 #15 Aug 07 2025 16:53:28 %S A237191 2,520360,14320216,30527896,119668186,120506050,131448430,142493926, %T A237191 211158676,254574706,276368680,306216940,315122416,421132180, %U A237191 472731400,506213890,540271396,616078786,629310346,646308250,741176296,752897860,800587480,851425030,897745996 %N A237191 Numbers k such that k+1, k+3, k^2+1, k^2+3, k^4+1, k^4+3 are six primes. %H A237191 Giovanni Resta, <a href="/A237191/b237191.txt">Table of n, a(n) for n = 1..1000</a> %o A237191 (Python) %o A237191 from sympy import isprime %o A237191 for n in range(0,1000000000,2): %o A237191 if isprime(n+1) and isprime(n*n+1) and isprime(n**4+1): %o A237191 if isprime(n+3) and isprime(n*n+3) and isprime(n**4+3): %o A237191 print(n, end=', ') %Y A237191 A subsequence of A067662, A070325, A070689, A080149. %K A237191 nonn %O A237191 1,1 %A A237191 _Alex Ratushnyak_, Feb 04 2014