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 A152508 #6 May 12 2020 12:55:52
%S A152508 0,0,42,1836695,10530242387,29832986150825,60695128902586540,
%T A152508 103817995457729295887,161328267155502711433605,
%U A152508 237364194180589518867292325,338385077937653019716292059598,473635313924991038119333176290875,655918703527056982804817522787817607
%N A152508 1/10 of the number of permutations of 4 indistinguishable copies of 1..n with exactly 6 local maxima.
%H A152508 Andrew Howroyd, <a href="/A152508/b152508.txt">Table of n, a(n) for n = 1..200</a>
%o A152508 (PARI) \\ PeaksBySig defined in A334774.
%o A152508 a(n) = {PeaksBySig(vector(n,i,4), [5])[1]/10} \\ _Andrew Howroyd_, May 12 2020
%Y A152508 Cf. A152504, A334774.
%K A152508 nonn
%O A152508 1,3
%A A152508 _R. H. Hardin_, Dec 06 2008
%E A152508 Terms a(8) and beyond from _Andrew Howroyd_, May 12 2020