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%I #3 Sep 15 2012 13:47:04
%S 0,0,5,18,84,568,4122,33910
%N Second column of A216722.
%D Wayne M. Dymacek, Isaac Lambert and Kyle Parsons, Arithmetic Progressions in Permutations, http://math.ku.edu/~ilambert/CN.pdf, 2012.
%Y Cf. A216722, A165962.
%K nonn
%O 3,3
%A _N. J. A. Sloane_, Sep 15 2012