%I #5 Dec 29 2023 23:15:04
%S 1,1,3,9,27,87,350,1675,7848,36711,196510,1177139,6908609,40106433,
%T 256572630,1785661795,12221831460,82732094377,603846490132,
%U 4714585241090,36290179829390,276421527541533
%N Number of permutations of 1..n with sum (i-p(i))^2 <= n*(n-1)/2.
%K nonn
%O 1,3
%A _R. H. Hardin_, Jul 06 2010
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