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A055278 Number of rooted trees with n nodes and 3 leaves. 1
1, 3, 8, 18, 35, 62, 103, 161, 241, 348, 487, 664, 886, 1159, 1491, 1890, 2364, 2922, 3574, 4329, 5198, 6192, 7322, 8600, 10039, 11651, 13450, 15450, 17665, 20110, 22801, 25753, 28983, 32508, 36345, 40512, 45028, 49911, 55181, 60858, 66962 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

LINKS

Index entries for sequences related to rooted trees

FORMULA

G.f.: x^4(x^3+x^2+1)/[(1-x^2)(1-x^3)(1-x)^3] (conjectured). - Ralf Stephan, Mar 07 2004

CROSSREFS

Column 3 of A055277.

Sequence in context: A075342 A083726 A081489 * A036628 A004035 A169763

Adjacent sequences:  A055275 A055276 A055277 * A055279 A055280 A055281

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), May 09 2000

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Last modified February 15 04:59 EST 2012. Contains 205694 sequences.