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%I #12 Nov 16 2023 07:15:31
%S 2,2,12,62,384,2574,20432,183790,1833102,20075568,240972780,
%T 3128714960,43794182164,656192916356,10493589363960,178319646743428
%N Number of permutations of 1..n with the sum of squared adjacent differences <= (n-1)*n*(n+1)/6.
%Y Cf. A000292, A180073.
%K nonn,more
%O 2,1
%A _R. H. Hardin_, Aug 09 2010
%E a(14) from _Donovan Johnson_, Oct 11 2010
%E a(15)-a(17) from _Martin Ehrenstein_, Nov 16 2023
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