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 A113765 #3 Mar 30 2012 18:49:39 %S A113765 1,7,17,717,17717,71717717,1771771717717,717177171771771717717, %T A113765 1771771717717717177171771771717717, %U A113765 7171771717717717177171771771717717717177171771771717717 %N A113765 Define the first two terms to be 1 and 7. All the other terms are obtained by concatenating the two previous terms. %C A113765 a(n) has Fibonacci(n) digits and the sum of all digits is given by Fibonacci(n-2)+7*Fibonacci(n-1) for all n>4. - _Stefan Steinerberger_, Jan 21 2006 %e A113765 The third term is 17 and it is obtained by concatenating the two previous terms 1 and 7. %Y A113765 Cf. A008352, A113526. %Y A113765 Cf. A000045 - the Fibonacci numbers. %K A113765 nonn,base %O A113765 0,2 %A A113765 _Parthasarathy Nambi_, Jan 18 2006 %E A113765 More terms from _Stefan Steinerberger_, Jan 21 2006