%I A003507 M2066
%S A003507 1,1,0,0,2,13,199,3773
%N A003507 Number of rigid tournaments with n nodes.
%D A003507 V. J. Mueller, J. Nesetril and J. Pelant, Either tournaments or algebras?, 
               Discrete Math. 11 (1975), 37-66.
%D A003507 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A003507 <a href="Sindx_To.html#tournament">Index entries for sequences related 
               to tournaments</a>
%Y A003507 Sequence in context: A073178 A062156 A049512 this_sequence A003085 A053598 
               A102585
%Y A003507 Adjacent sequences: A003504 A003505 A003506 this_sequence A003508 A003509 
               A003510
%K A003507 nonn
%O A003507 1,5
%A A003507 N. J. A. Sloane (njas(AT)research.att.com).