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 A129678 #8 Aug 05 2019 14:31:53
%S A129678 2,0,-2,2,-1,1,-2,2,-1,2,0,1,2,0,-6,2,-1,2,0,1,-4,2,-1,1,2,0,-4,2,-1,
%T A129678 1,-2,2,-1,2,0,1,-4,2,-1,1,2,0,-4,2,-1,2,0,1,2,0,-6,2,-1,1,-2,2,-1,2,
%U A129678 0,1,2,0,-6,2,-1,2,0,1,-4,2,-1,1,2,0,-4,2,-1,2,0,1,2,0,-6,2,-1,1,-2,2,-1,2,0,1,-4,2,-1,1,2,0,-4
%N A129678 Distance sequence of A129674: A129674(n)-n.
%C A129678 The numbers in this sequence are in the range of [ -6,2], but they are never -3 nor -5 (tested up to 10^4). The relative density of the values {-6,-4,-2,-1,0,1,2} asymptotically is {1,2,1,4,4,4,8}.
%Y A129678 Distance of A129674, Cf. A129679, A129680, A129681 and A001969.
%K A129678 sign
%O A129678 1,1
%A A129678 Ferenc Adorjan (fadorjan(AT)freemail.hu or ferencadorjan(AT)gmail.com), May 01 2007