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 A083400 #4 Mar 31 2012 14:40:08 %S A083400 3,4,5,6,27 %N A083400 Numbers n such that A053664(n) and A073605(n) are primes. %e A083400 a(4)=6 because A053664(6)=29243 and A073605(6)=787 are primes. %t A083400 For[k = 0, k < 1415, If[PrimeQ[ChineseRemainder[Range[k], Prime[Range[k]]]] && PrimeQ[ChineseRemainder[ -Range[k], Prime[Range[k]]]], Print[k]], k++ ] %Y A083400 Cf. A053664, A073605, A083376. %K A083400 more,nonn %O A083400 1,1 %A A083400 _Farideh Firoozbakht_, Jun 07 2003