Search: id:A000256
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%I A000256 M2923 N1173
%S A000256 1,1,0,1,3,12,52,241,1173,5929,30880,164796,897380,4970296,27930828,
%T A000256 158935761,914325657,5310702819,31110146416,183634501753,1091371140915,
%U A000256 6526333259312,39246152584304,237214507388796,1440503185260748
%N A000256 Number of simple triangulations of plane with n nodes.
%D A000256 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A000256 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A000256 W. T. Tutte, A census of planar triangulations, Canad. J. Math., 14 (1962), 
               21-38.
%D A000256 W. T. Tutte, A census of planar maps, Canad. J. Math., 15 (1963), 249-271.
%D A000256 W. T. Tutte, The enumerative theory of planar maps, pp. 437-448 of J. 
               N. Srivastava, ed., A Survey of Combinatorial Theory, North-Holland, 
               1973.
%H A000256 T. D. Noe, <a href="b000256.txt">Table of n, a(n) for n=3..200</a>
%F A000256 a(n) = (1/4)*(7*binomial(3*n-9, n-4)-(8*n^2-43*n+57)*a(n-1))/(8*n^2-51*n+81), 
               n>4. - Vladeta Jovovic (vladeta(AT)eunet.rs), Aug 19 2004
%Y A000256 Sequence in context: A010736 A151197 A007198 this_sequence A124202 A138269 
               A151198
%Y A000256 Adjacent sequences: A000253 A000254 A000255 this_sequence A000257 A000258 
               A000259
%K A000256 nonn,nice
%O A000256 3,5
%A A000256 N. J. A. Sloane (njas(AT)research.att.com).
%E A000256 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Aug 19 2004

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