# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a159723 Showing 1-1 of 1 %I A159723 #6 May 14 2020 16:18:06 %S A159723 0,2,924,130672,11798800,882163680,60299781248,3933244436480, %T A159723 249755233812480,15590436752711680,961617113393102848, %U A159723 58776390094965178368,3566492692755774439424,215104023517101044006912,12906638765341805641728000,770965701556822810254376960 %N A159723 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 local maxima. %H A159723 Andrew Howroyd, Table of n, a(n) for n = 1..200 %o A159723 (PARI) \\ CircPeaksBySig defined in A334778. %o A159723 a(n) = {CircPeaksBySig(vector(n, i, 3), [3])[1]} \\ _Andrew Howroyd_, May 13 2020 %Y A159723 Cf. A159721, A159722, A334778. %K A159723 nonn %O A159723 1,2 %A A159723 _R. H. Hardin_, Apr 20 2009 %E A159723 Terms a(9) and beyond from _Andrew Howroyd_, May 13 2020 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE