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 A265302 #8 Dec 18 2015 11:35:57 %S A265302 5,0,5,6,1,2,8,8,7,8,9,3,5,2,0,0,1,1,6,8,6,0,7,5,7,4,9,4,2,5,9,5,3,1, %T A265302 1,9,2,8,1,2,4,5,4,1,8,1,3,3,7,4,3,2,5,9,2,9,1,3,5,6,8,2,0,4,6,7,1,6, %U A265302 5,0,2,4,3,7,1,3,5,2,0,3,7,2,2,6,2,9 %N A265302 Decimal expansion of Sum_{k>=1} (c(2k)-c(2k-1)), where c = convergents to sqrt(6). %e A265302 sum = 0.50561288789352001168607574942595311928124541813374... %t A265302 x = Sqrt[6]; z = 600; c = Convergents[x, z]; %t A265302 s1 = Sum[x - c[[2 k - 1]], {k, 1, z/2}]; N[s1, 200] %t A265302 s2 = Sum[c[[2 k]] - x, {k, 1, z/2}]; N[s2, 200] %t A265302 N[s1 + s2, 200] %t A265302 RealDigits[s1, 10, 120][[1]] (* A265300 *) %t A265302 RealDigits[s2, 10, 120][[1]] (* A265301 *) %t A265302 RealDigits[s1 + s2, 10, 120][[1]](* A265302 *) %Y A265302 Cf. A010464, A265300, A265301, A265288 (guide). %K A265302 nonn,cons %O A265302 0,1 %A A265302 _Clark Kimberling_, Dec 13 2015