%I A001185 M4372 N1837
%S A001185 0,1,1,7,21,112,456,2603,13203
%N A001185 Number of nontrivial Baxter permutations of length 2n-1.
%D A001185 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001185 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001185 W. M. Boyce, Generation of a class of permutations associated with commuting 
               functions, Math. Algorithms, 2 (1967), 19-26.
%Y A001185 Cf. A001181, A001183.
%Y A001185 Sequence in context: A100025 A121157 A038184 this_sequence A001693 A061961 
               A028248
%Y A001185 Adjacent sequences: A001182 A001183 A001184 this_sequence A001186 A001187 
               A001188
%K A001185 nonn,nice,more
%O A001185 1,4
%A A001185 N. J. A. Sloane (njas(AT)research.att.com).