Search: id:A036648
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%I A036648
%S A036648 0,1,0,1,1,2,3,6,11,24,48,109,242,574,1346,3258,7928,19664,49158,
%T A036648 124384,316791,813231,2099326,5451613,14226697,37306971,98247737,
%U A036648 259779698,689385447,1835644498,4902992215,13133825317,35276818036
%N A036648 Number of centered 5-valent trees with n nodes.
%H A036648 E. M. Rains and N. J. A. Sloane, <a href="http://www.cs.uwaterloo.ca/
               journals/JIS/index.html">On Cayley's Enumeration of Alkanes (or 4-Valent 
               Trees).</a>, J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.
%H A036648 <a href="Sindx_Tra.html#trees">Index entries for sequences related to 
               trees</a>
%Y A036648 Sequence in context: A000055 A006787 A000992 this_sequence A047750 A072187 
               A122852
%Y A036648 Adjacent sequences: A036645 A036646 A036647 this_sequence A036649 A036650 
               A036651
%K A036648 nonn
%O A036648 0,6
%A A036648 N. J. A. Sloane (njas(AT)research.att.com).

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