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 A136241 #6 Jan 20 2019 13:11:49 %S A136241 2,4,6,10,16,28,30,46,60,66,70,96,100,126,130,138,148,180,196,240,268, %T A136241 306,330,358,378,396,408,418,420,448,456,478,486,490,598,606,616,618, %U A136241 640,646,676,708,750,786,838,856,906,946,966,976,996,1050,1060,1090 %N A136241 Numbers n among A006093 such that n^2 + n - 1 is prime. %H A136241 Harvey P. Dale, <a href="/A136241/b136241.txt">Table of n, a(n) for n = 1..1000</a> %F A136241 a(n) = A091567(n) - 1. %t A136241 Select[Prime[Range[200]]-1,PrimeQ[#^2+#-1]&] (* _Harvey P. Dale_, Jan 20 2019 *) %Y A136241 Cf. A136240, A091568. %K A136241 nonn %O A136241 1,1 %A A136241 _Lekraj Beedassy_, Dec 23 2007