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 A090696 #20 Sep 03 2019 03:29:12 %S A090696 4,8,10,18,20,28,32,38,42,48,52,62,70,78,80,90,118,120,130,148,158, %T A090696 160,172,182,200,210,218,228,230,232,238,248,252,258,260,262,270,272, %U A090696 290,298,300,302,318,340,342,350,358,360,370,372,378,388,398,410,412,420 %N A090696 Numbers k such that k^2 - 11 is a prime. %D A090696 M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988. %D A090696 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997. %H A090696 Daniel Starodubtsev, <a href="/A090696/b090696.txt">Table of n, a(n) for n = 1..5000</a> %F A090696 a(n) = 2*A091271(n). %t A090696 Select[Range[4,1200],PrimeQ[#^2-11]&] (* _Vladimir Joseph Stephan Orlovsky_, Feb 27 2011*) %Y A090696 A091272 gives primes, A091273 gives prime index. %K A090696 nonn %O A090696 1,1 %A A090696 _Giovanni Teofilatto_, Dec 20 2003 %E A090696 Extended by _Ray Chandler_, Dec 27 2003