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 A152502 #6 May 12 2020 12:55:18
%S A152502 0,0,1,7274,6251162,2764274116,897380159188,247392790837624,
%T A152502 62200280199674352,14820288466400312448,3420153590479988396800,
%U A152502 774303834249035054901248,173288568985609322651099136,38513999874946087671220207616,8524401267844398602674455314432
%N A152502 1/12 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 5 local maxima.
%H A152502 Andrew Howroyd, <a href="/A152502/b152502.txt">Table of n, a(n) for n = 1..200</a>
%o A152502 (PARI) \\ PeaksBySig defined in A334774.
%o A152502 a(n) = {PeaksBySig(vector(n,i,3), [4])[1]/12} \\ _Andrew Howroyd_, May 12 2020
%Y A152502 Cf. A152499, A334774.
%K A152502 nonn
%O A152502 1,4
%A A152502 _R. H. Hardin_, Dec 06 2008
%E A152502 Terms a(9) and beyond from _Andrew Howroyd_, May 12 2020