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 A261083 #5 Aug 10 2015 07:31:10 %S A261083 0,0,0,1,0,0,1,2,1,2,2,1,1,1,0,1,1,1,1,0,0,0,0,0,1,1,1,0,1,2,3,1,1,2, %T A261083 4,1,1,1,0,1,2,3,1,1,2,3,0,0,0,0,0,0,1,1,1,0,1,2,3,1,1,2,3,0,0,0,0,0, %U A261083 0,0,1,2,1,0,1,1,2,1,1,1,0,1,2,3,1,1,2,3,0,0,0,0,0,0,0,1,2,1,0,1,1,2,2,3,3,3,3,2,3,4,4,4,4,5,1,1,1,0,1,2,3 %N A261083 a(n) = A219648(n) - A219643(n). %H A261083 Antti Karttunen, <a href="/A261083/b261083.txt">Table of n, a(n) for n = 0..11817</a> %F A261083 a(n) = A219648(n) - A219643(n). %o A261083 (Scheme) (define (A261083 n) (- (A219648 n) (A219643 n))) %Y A261083 Cf. A219648, A219643, A261084. %K A261083 nonn %O A261083 0,8 %A A261083 _Antti Karttunen_, Aug 09 2015