%I A005410 M0435
%S A005410 1,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9,10
%N A005410 From interval orders.
%C A005410 The g.f. -(-1-z+z**3)/(1+z)/(z-1)**2 conjectured by S. Plouffe in his 
               1992 dissertation is wrong.
%D A005410 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A005410 Fishburn, Peter C.; Maximum semiorders in interval orders. SIAM J. Algebraic 
               Discrete Methods 2 (1981), no. 2, 127-135.
%H A005410 S. Plouffe, <a href="http://www.lacim.uqam.ca/%7Eplouffe/articles/MasterThesis.pdf">
               Approximations de S\'{e}ries G\'{e}n\'{e}ratrices et Quelques Conjectures</
               a>, Dissertation, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 
               1992.
%H A005410 S. Plouffe, <a href="http://www.lacim.uqam.ca/%7Eplouffe/articles/FonctionsGeneratrices.pdf">
               1031 Generating Functions and Conjectures</a>, Universit\'{e} du 
               Qu\'{e}bec \`{a} Montr\'{e}al, 1992.
%Y A005410 Sequence in context: A030581 A113609 A067086 this_sequence A120835 A091374 
               A065603
%Y A005410 Adjacent sequences: A005407 A005408 A005409 this_sequence A005411 A005412 
               A005413
%K A005410 nonn
%O A005410 1,2
%A A005410 N. J. A. Sloane (njas(AT)research.att.com).