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 A030314 #8 Mar 30 2020 19:12:00 %S A030314 1,0,1,2,3,2,1,2,3,2,3,2,3,4,5,6,7,6,5,4,5,6,5,4,5,4,5,4,5,6,7,6,7,6, %T A030314 5,6,7,8,7,8,9,8,9,10,11,12,13,14,15,14,13,12,11,12,13,12,11,10,11,10, %U A030314 11,10,9,10,11,12,11,10,11,10,9,10,9,10,11,10 %N A030314 (# 1's)-(# 0's) in first n terms of A030308. %C A030314 For historical reasons this sequence starts counting from A030308(1). - _Sean A. Irvine_, Mar 30 2020 %K A030314 nonn %O A030314 1,4 %A A030314 _Clark Kimberling_