

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
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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



