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 A224495 #15 Apr 12 2013 08:08:04
%S A224495 9,126,29,237,420,2,186,30,2349,896,1266,147,741,140,3021,924,19571,
%T A224495 896,791,11495,32,7016,3522,5336,932,5480,107,1439,1770,209,4239,1716,
%U A224495 477,1196,1446,900,9176,1920,2375,39,2351,590,2724,422,3171,179,1751,426,65
%N A224495 Smallest k such that k*2*p(n)^2+1=q is prime 2*k*q^2+1=r 2*k*r^2+1=s, r and s are also prime.
%H A224495 Pierre CAMI, <a href="/A224495/b224495.txt">Table of n, a(n) for n = 1..5600</a>
%t A224495 a[n_] := For[k = 1, True, k++, p = Prime[n]; If[PrimeQ[q = k*2*p^2 + 1] && PrimeQ[r = k*2*q^2 + 1] && PrimeQ[k*2*r^2 + 1], Return[k]]]; Table[ a[n] , {n, 1, 49}] (* _Jean-François Alcover_, Apr 12 2013 *)
%Y A224495 Cf. A224489, A224490, A224492, A224492, A224493, A224494, A224496.
%K A224495 nonn
%O A224495 1,1
%A A224495 _Pierre CAMI_, Apr 08 2013