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 A067662 #21 Sep 08 2022 08:45:05 %S A067662 1,2,4,6,16,20,24,54,56,74,90,160,180,204,210,340,430,436,466,556,584, %T A067662 690,760,930,936,966,986,1144,1150,1246,1406,1434,1586,1644,1700,1824, %U A067662 1850,1870,1910,2074,2126,2224,2260,2266,2336,2360,2536,2604,2646,2676 %N A067662 Numbers n such that n^2 + 1 and n^4 + 1 are primes. %H A067662 Giovanni Resta, <a href="/A067662/b067662.txt">Table of n, a(n) for n = 1..10000</a> (first 5000 terms from Seiichi Manyama) %o A067662 (Magma) [n: n in [0..10000]| IsPrime(n^2+1) and IsPrime(n^4+1)] // _Vincenzo Librandi_, Aug 07 2010 %Y A067662 Intersection of A000068 and A005574. %K A067662 nonn %O A067662 1,2 %A A067662 _Benoit Cloitre_, Feb 23 2002