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 A159726 #8 May 14 2020 16:57:07
%S A159726 0,0,0,1256,24483200,55067152128,57615626479712,41069543783239872,
%T A159726 23516539818144774912,11776285299306762639680,
%U A159726 5412720242324956991133440,2351154988094363114287766016,983075755980176565659196488192,400400884398187607904444939190272
%N A159726 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 6 local maxima.
%H A159726 Andrew Howroyd, <a href="/A159726/b159726.txt">Table of n, a(n) for n = 1..200</a>
%o A159726 (PARI) \\ CircPeaksBySig defined in A334778.
%o A159726 a(n) = {CircPeaksBySig(vector(n, i, 3), [6])[1]} \\ _Andrew Howroyd_, May 14 2020
%Y A159726 Cf. A159721, A159722, A334778.
%K A159726 nonn
%O A159726 1,4
%A A159726 _R. H. Hardin_, Apr 20 2009
%E A159726 Terms a(8) and beyond from _Andrew Howroyd_, May 14 2020