%I A007081 M3009
%S A007081 1,1,3,15,219,7839,777069,208836207,156458382975,328208016021561,
%T A007081 1946879656265710431,32834193098697741359313
%N A007081 Number of labeled Eulerian oriented graphs with n nodes.
%D A007081 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007081 B. D. McKay, Applications of a technique for labeled enumeration, Congress. 
               Numerantium, 40 (1983), 207-221.
%Y A007081 Sequence in context: A145272 A117820 A126453 this_sequence A126455 A136466 
               A114735
%Y A007081 Adjacent sequences: A007078 A007079 A007080 this_sequence A007082 A007083 
               A007084
%K A007081 nonn,nice
%O A007081 1,3
%A A007081 N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein (mira(AT)math.berkeley.edu)