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A055330
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Number of rooted identity trees with n nodes and 5 leaves.
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0
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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
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10,1
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LINKS
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Table of n, a(n) for n=10..38.
Index entries for sequences related to rooted trees
Index to sequences with 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).
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FORMULA
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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]
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CROSSREFS
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Column 5 of A055327.
Sequence in context: A062124 A169832 A100606 * A034495 A034493 A121626
Adjacent sequences: A055327 A055328 A055329 * A055331 A055332 A055333
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KEYWORD
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nonn,easy
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AUTHOR
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Christian G. Bower, May 12 2000
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STATUS
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approved
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