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 A039680 #4 May 18 2013 16:49:22 %S A039680 1,12,124,1245,12457,1245710,124571011,12457101113,1245710111316, %T A039680 124571011131619,12457101113161920,1245710111316192023, %U A039680 124571011131619202325 %N A039680 Concatenate Fibonacci-lucky numbers. %C A039680 See A039672 for definition. %K A039680 nonn,base %O A039680 1,2 %A A039680 _Felice Russo_