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Search: id:A038380
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| A038380 |
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Number of perifusenes with one internal vertex. |
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+0
1
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| 0, 0, 0, 1, 1, 6, 24, 109, 477, 2155, 9647, 43621, 197767, 901436, 4125636, 18964119, 87508095, 405289754, 1883445328, 8780346115, 41052409755, 192461618324, 904573028990, 4261485821599, 20119936936041, 95186856459869
(list; graph; listen)
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OFFSET
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0,6
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REFERENCES
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S. J. Cyvin et al., Number of perifusenes with one internal vertex, Rev. Roumaine Chem., 38 (1993), 65-77.
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FORMULA
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G.f.=(2-9x+21x^2-16x^3)/2-(4-18x+17x^2)*(1-x)^(1/2)*(1-5x)^(1/2)/6-x(1-x^2)^(1/2)*(1-5x^2)^(1/2)/2-(1-x^3)^(1/2)*(1-5x^3)^(1/2)/3. - Emeric Deutsch (deutsch(AT)duke.poly.edu), May 14 2004
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CROSSREFS
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Sequence in context: A026972 A075484 A122739 this_sequence A052745 A109583 A100934
Adjacent sequences: A038377 A038378 A038379 this_sequence A038381 A038382 A038383
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), May 14 2004
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