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 A256663 #4 Apr 09 2015 08:03:07 %S A256663 0,1,2,3,5,5,8,8,8,14,13,13,13,13,22,23,21,22,21,21,21,21,35,36,37,39, %T A256663 34,35,36,34,35,34,34,34,34,56,57,58,60,60,63,63,55,56,57,58,60,55,56, %U A256663 57,55,56,55,55,55,55,90,91,92,94,94,97,97,97,103,102 %N A256663 Nonnegative part of the minimal alternating Fibonacci representation of n. %C A256663 See A256655 for definitions. %H A256663 Clark Kimberling, <a href="/A256663/b256663.txt">Table of n, a(n) for n = 0..1000</a> %F A256663 A256663(n) - A256664(n) = n. %e A256663 R(9) = 13 - 5 + 1, so that a(9) = 13 + 1 = 14. %t A256663 b[n_] = Fibonacci[n]; bb = Table[b[n], {n, 1, 70}]; %t A256663 h[0] = {1}; h[n_] := Join[h[n - 1], Table[b[n + 2], {k, 1, b[n]}]]; %t A256663 g = h[23]; %t A256663 r[0] = {0}; r[n_] := If[MemberQ[bb, n], {n}, Join[{g[[n]]}, -r[g[[n]] - n]]]; %t A256663 Table[Total[Abs[r[n]]], {n, 0, 100}] (* A256662 *) %t A256663 Table[Total[(Abs[r[n]] + r[n])/2], {n, 0, 100}] (* A256663 *) %t A256663 Table[Total[(Abs[r[n]] - r[n])/2], {n, 0, 100}] (* A256664 *) %Y A256663 Cf. A000045, A256655, A256662, A256664. %K A256663 nonn,easy %O A256663 0,3 %A A256663 _Clark Kimberling_, Apr 08 2015