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Number of partial matchings of n elements treatable by "PTR" (Procedure Triple Reverse).
0

%I #6 Apr 10 2013 17:09:40

%S 1,1,2,4,10,26,76,232,756,2548,8906,31846,116422,432758,1634944

%N Number of partial matchings of n elements treatable by "PTR" (Procedure Triple Reverse).

%H Lily Yen, <a href="http://arxiv.org/abs/1209.3082">A Bijection for Crossings and Nestings</a>, arXiv preprint arXiv:1209.3082, 2012

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Dec 27 2012