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A038380
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Number of perifusenes with one internal vertex.
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0
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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; refs; listen; history; internal format)
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OFFSET
| 0,6
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REFERENCES
| S. J. Cyvin et al., Number of perifusenes with one internal vertex, Rev. Roumaine Chem., 38 (1993), 65-77.
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FORMULA
| 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
| Sequence in context: A026972 A075484 A122739 * A052745 A187668 A109583
Adjacent sequences: A038377 A038378 A038379 * A038381 A038382 A038383
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), May 14 2004
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