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 A158790 #16 Nov 11 2019 09:24:23
%S A158790 1,3,11,13,77,83,181,381,525,3829,4141,6093,9589
%N A158790 Odd integers n such that (x^n + 1/x^n)/sqrt(8) + 1 is prime, where x = sqrt(8) + sqrt(7).
%C A158790 No other terms below 32000.
%H A158790 David Broadhurst, <a href="http://groups.yahoo.com/group/primenumbers/message/19925">The House That Jack Built</a>
%H A158790 David Broadhurst and others, <a href="/A158790/a158790.txt">The house that Jack built</a>, digest of 69 messages in primenumbers Yahoo group, Mar 22 - May 10, 2009.
%o A158790 (PARI) { y = Mod(x,x^4-30*x^2+1); q8 = Mod(-1/2*x^3 + 31/2*x,x^4-30*x^2+1); forstep(n=1,10^4,2, if( ispseudoprime( polcoeff(lift((y^n+y^(-n))/q8),0) + 1 ), print(n);); ); } \\ _Max Alekseyev_, Dec 09 2011
%K A158790 more,nonn
%O A158790 1,2
%A A158790 _Cino Hilliard_, Mar 26 2009
%E A158790 a(11)-a(13) from _Max Alekseyev_, Dec 09 2011