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A055330 Number of rooted identity trees with n nodes and 5 leaves. 2
3, 26, 116, 387, 1068, 2587, 5678, 11540, 22034, 39957, 69366, 116009, 187823, 295574, 453582, 680625, 1000952, 1445516, 2053343, 2873165, 3965216, 5403347, 7277330, 9695538, 12787847, 16708973, 21642067, 27802808, 35443793 (list; graph; refs; listen; history; text; internal format)
OFFSET

10,1

LINKS

Andrew Howroyd, Table of n, a(n) for n = 10..1000

Index entries for sequences related to rooted trees

Index entries for linear recurrences with constant coefficients, signature (4,-4,-3,7,-3,0,1,0,-3,0,3,0,-1,0,3,-7,3,4,-4,1).

FORMULA

G.f.: -x^10*(3*x^9 +6*x^8 +16*x^7 +29*x^6 +38*x^5 +41*x^4 +36*x^3 +24*x^2 +14*x +3)/((x -1)^9*(x +1)^3*(x^2 +1)*(x^2 +x +1)*(x^4 +x^3 +x^2 +x +1)). - Colin Barker, Nov 07 2012

CROSSREFS

Column 5 of A055327.

Sequence in context: A322300 A100606 A307918 * A034495 A034493 A265467

Adjacent sequences:  A055327 A055328 A055329 * A055331 A055332 A055333

KEYWORD

nonn,easy

AUTHOR

Christian G. Bower, May 12 2000

STATUS

approved

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Last modified June 15 22:06 EDT 2021. Contains 345053 sequences. (Running on oeis4.)