%I A005176 M0303
%S A005176 1,2,2,4,3,8,6,22,26,176,546,19002,389454,50314870,2942198546,
%T A005176 1698517037030
%N A005176 Number of regular graphs with n nodes.
%D A005176 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A005176 P. Steinbach, Field Guide to Simple Graphs. Design Lab, Albuquerque NM, 
               1990.
%H A005176 E. Friedman, <a href="a000088a.gif">Illustration of small graphs</a>
%H A005176 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               RegularGraph.html">Link to a section of The World of Mathematics.</
               a>
%F A005176 a(n) = A005177(n) + A068932(n). - David Wasserman (dwasserm(AT)earthlink.net), 
               Mar 08 2002
%Y A005176 Cf. A005177, A051031, A068932.
%Y A005176 Row sums of triange A051031. [From Jason Kimberley (Jason.Kimberley(AT)newcastle.edu.au), 
               Sep 25 2009]
%Y A005176 Sequence in context: A006799 A056429 A133806 this_sequence A050335 A140860 
               A019681
%Y A005176 Adjacent sequences: A005173 A005174 A005175 this_sequence A005177 A005178 
               A005179
%K A005176 nonn,nice,hard,more
%O A005176 1,2
%A A005176 N. J. A. Sloane (njas(AT)research.att.com).
%E A005176 More terms from David Wasserman (dwasserm(AT)earthlink.net), Mar 08 2002
%E A005176 Terms a(15) and a(16) were appended by Jason Kimberley (Jason.Kimberley(AT)newcastle.edu.au), 
               Sep 25 2009