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 A108047 #19 Dec 18 2012 10:47:43 %S A108047 1,1,11,111,11111,11111111,1111111111111,111111111111111111111, %T A108047 1111111111111111111111111111111111, %U A108047 1111111111111111111111111111111111111111111111111111111,11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 %N A108047 Concatenation of the previous pair of numbers, with the first two terms both 1. %C A108047 The Fibonacci numbers, A000045, represented in base 1 (see A000042). %F A108047 a(n) = (10^A000045(n)-1)/9. %F A108047 a(n) = A000042(A000045(n)). %e A108047 The third term is 11 which is the concatenation of the first two terms 1 and 1. %Y A108047 Column b=1 of A214326. %Y A108047 Column k=1 of A214679. %Y A108047 Cf. A037842, A131293. %K A108047 nonn,easy,base %O A108047 1,3 %A A108047 _Parthasarathy Nambi_, Jun 01 2005 %E A108047 Edited by _Jason Kimberley_, Dec 15 2012