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 A143586 #2 Mar 30 2012 18:57:10 %S A143586 1,1,2,4,6,9,13,19,29,44,66,99,151,225,338,506,761,1138,1705,2555, %T A143586 3835,5751,8629,12953,19426,29146,43723,65585,98351,147501,221259, %U A143586 331899,497861,746874,1120279,1680480,2520838,3781134,5671673,8507660,12761336 %N A143586 Length of row n of the Kolakoski fan A143477. %C A143586 Conjecture: if L(n)=A143586(n), then lim(L(n+1)/L(n)) = 3/2. For a more general conjecture see A143589. %e A143586 The first 4 rows of A143477 are %e A143586 1 %e A143586 2 %e A143586 22 %e A143586 1122. Their lengths are 1,1,2,4. %Y A143586 Cf. A000002, A143477. %K A143586 nonn %O A143586 1,3 %A A143586 _Clark Kimberling_, Aug 25 2008