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 A141148 #10 Dec 04 2015 09:30:26
%S A141148 2,3,14,65,346,1929,11442,70310,445928,2896239,19186738,129184583,
%T A141148 881808726,6089840427,42482905678,298976072384,2120377458898,
%U A141148 15141288786096,108784152585234,785869928763325,5705406374237814
%N A141148 Number of aperiodic ternary necklaces with n beads of each color and no adjacent beads of the same color.
%H A141148 L. Q. Eifler, K. B. Reid Jr., D. P. Roselle, <a href="http://dx.doi.org/10.1007/BF01819761">Sequences with adjacent elements unequal</a>, Aequationes Mathematicae 6 (2-3), 1971.
%H A141148 Max Alekseyev, <a href="http://home.gwu.edu/~maxal/gpscripts/">PARI scripts for various problems</a>
%F A141148 a(n) = Sum_{d|n} moebius(n/d) * A141147(d) / n.
%Y A141148 Cf. A110706, A110707, A110710, A110711, A141146, A141147.
%K A141148 nonn
%O A141148 1,1
%A A141148 _Max Alekseyev_, Jun 10 2008