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A180069 Number of permutations of 1..n with the sum of squared adjacent differences < n*(n-1)/2 0

%I

%S 0,2,2,6,34,132,448,1986,8422,39902,195946,1024366,5505428,31185644,

%T 183904498,1119250852,7025176096

%N Number of permutations of 1..n with the sum of squared adjacent differences < n*(n-1)/2

%K nonn

%O 2,2

%A _R. H. Hardin_ Aug 09 2010

%E a(17)-a(18) from _Donovan Johnson_, Oct 11 2010

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Last modified April 14 12:11 EDT 2021. Contains 342949 sequences. (Running on oeis4.)