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%I #7 May 06 2020 01:38:09
%S 0,10,11143,1831644,132439905,5925941490,192648942945,4982201574576,
%T 108507581733075,2068026851853900,35442327497832350,
%U 557245611341867160,8160353475203019510,112618455705219419340,1478355077007310516350,18597419323476152223600
%N Number of permutations of 1..n arranged in a circle with exactly 9 adjacent element pairs in decreasing order.
%H Andrew Howroyd, <a href="/A151582/b151582.txt">Table of n, a(n) for n = 9..500</a>
%Y Column k=9 of A334218.
%K nonn
%O 9,2
%A _R. H. Hardin_, May 21 2009
%E Terms a(17) and beyond from _Andrew Howroyd_, May 05 2020