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 A093089 #2 Oct 09 2013 14:17:20 %S A093089 1,1,2,3,5,8,13,21,34,55,89,1,44,90,45,1,34,1,35,46,35,35,36,81,81,70, %T A093089 71,1,17,1,62,1,51,1,41,72,18,18,63,63,52,52,42,1,13,90,36,81,1,26,1, %U A093089 15,1,4,94,43,14,1,3,1,26,1,17,82,27,27,16,16,5,98,1,37,57,15,4,4,27,27,18 %N A093089 "Fibonacci in pairs": start with a(1)=1, a(2)=1; repeatedly adjoin sum of previous two terms but chopped from the right into pairs of 2 digits. %C A093089 Do all pairs of digits appear infinitely often? The sequence is not periodic. %e A093089 ... a(11)=a(9)+a(10), a(12)=left pair of (a(10)+a(11)=55+89=1 44), a(13)=right pair of (a(10)+a(11)=55+89=1 44), a(14)=a(11)+a(12) ... %Y A093089 Cf. A093086, A093087, A093088. %K A093089 nonn,base %O A093089 1,3 %A A093089 _Bodo Zinser_, Mar 20 2004