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 A104349 #2 Oct 02 2013 15:47:25 %S A104349 0,41,941,576529484441,1876918496182251795617689,144121100816449, %T A104349 841784729676625576529,1537615129148841464114400141611392413689,0, %U A104349 3844372136003481336432493136302529162809 %N A104349 Smallest prime formed by reverse concatenation of n consecutive square numbers, 0 if no such prime exists. %e A104349 a(3)=941 because 941 is the smallest prime formed from reverse concatenation of 3 consecutive square numbers i.e. 1,4 and 9. %K A104349 base,nonn %O A104349 1,2 %A A104349 _Shyam Sunder Gupta_, Apr 17 2005