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 A112080 #5 Mar 31 2012 14:02:21 %S A112080 0,2,-2,0,4,0,8,-2,0,0,0,12,-6,0,12,0,2,-2,0,-6,0,18,-6,0,0,0,2,-6,0, %T A112080 -4,0,2,-2,0,18,0,2,-2,0,24,0,6,-2,0,0,0,6,-8,0,4,0,2,-2,0,-6,0,32,-6, %U A112080 0,0,0,2,-6,0,-10,0,2,-2,0,28,0,2,-2,0,4,0,38,-2,0,0,0,6,-6,0,4,0,2 %N A112080 a(n) = difference between Jacobi-first-non-one(24n+1) and Jacobi-first-non-one(24n-1). %C A112080 The definition of Jacobi-first-non-one is given in A112056. %H A112080 A. Karttunen, <a href="/A112080/b112080.txt">Table of n, a(n) for n = 1..4096</a> %F A112080 a(n) = 4*A112054(n)+1. %Y A112080 A112081(n) = a(n)/2. A112082 gives the points where a(n) is zero. A112059 gives the nonzero terms. %K A112080 sign %O A112080 1,2 %A A112080 _Antti Karttunen_, Aug 27 2005