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 A157687 #12 Dec 19 2024 23:40:21 %S A157687 0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,0,1,0,0,0, %T A157687 1,0,0,1,0,1,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0, %U A157687 0,1,0,0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0 %N A157687 a(n) = n - A054353(A156351(n)). %F A157687 a(n) = 1 iff n is in A078649, a(n) = 0 iff n is in A054353. %F A157687 a(n) = n-A054353(A157684(n)+A157685(n)). %F A157687 a(n) = 1 - A156728(n). - _Alan Michael Gómez Calderón_, Dec 19 2024 %Y A157687 Cf. A156351, A156728, A157684, A157685, A157686 %K A157687 nonn %O A157687 1,1 %A A157687 _Benoit Cloitre_, Mar 04 2009