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Search: id:A131178
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A131178 Increasing binary trees with 2 colors for edge of outdegree 1. +0
1
1, 2, 5, 16, 64, 308, 1730, 11104 (list; graph; listen)
OFFSET

0,2

FORMULA

E.g.f.: {2*(e^{sqrt{2}x}-1)} / {(2+sqrt{2})-(2-sqrt{2})e^{sqrt{2}x}}

CROSSREFS

Sequence in context: A059685 A000112 A127083 this_sequence A003149 A027046 A000522

Adjacent sequences: A131175 A131176 A131177 this_sequence A131179 A131180 A131181

KEYWORD

nonn

AUTHOR

Wenjin Woan (wjwoan(AT)hotmail.com), Oct 31 2007

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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