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 A074304 #22 Nov 05 2024 18:59:39 %S A074304 5,7,13,19,31,43,89,101,229,293,457,541,653,659,1553,2003,2707,2749, %T A074304 7159,10289,26267,59581,63421,80911 %N A074304 Numbers k such that Lucas(2k)/3 is prime. %C A074304 Some of the larger entries may only correspond to probable primes. %H A074304 Ron Knott, <a href="http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibmaths.html#fibprimecarm">The Mathematics of the Fibonacci series</a>. %H A074304 Ron Knott, <a href="http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibpi.html#lucas">Pi and the Fibonacci Numbers</a>. %F A074304 a(n) = 2*A355980(n) + 1. - _Jinyuan Wang_, Jul 22 2022 %Y A074304 Cf. A049685, A074281, A355980. %K A074304 nonn,more %O A074304 1,1 %A A074304 _Shane Findley_, Sep 21 2002 %E A074304 More terms found by _David Broadhurst_, Bouk de Water, and _Shane Findley_, Oct 31 2002 %E A074304 a(22)-a(24) from _Michael S. Branicky_, Nov 05 2024