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Search: id:A159941
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| A159941 |
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Number of trisubstituted linear alkanes of composition C_n H_(2n-1) XYZ. |
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+0
1
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OFFSET
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2,1
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COMMENT
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See the paper by Valentin Vankov Iliev for details.
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REFERENCES
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Valentin Vankov Iliev, "A mathematical characterization of the groups of substitution isomerism of the linear alkanes", J. Math. Chem., 45 (2009), xxx-yyy. Page numbers unknown as of today as it is an 'online first' article.
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LINKS
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V. V. Iliev, A mathematical characterization of the groups of substitution isomerism of the linear alkanes, J. Math. Chem. (2009). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 08 2009]
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FORMULA
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a(n) = (4 n^3 - 18 n^2 + 38 n - 28) where n is the number of carbons.
a(n)=2*A159940(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 08 2009]
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EXAMPLE
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The number of trisubstituted linear decane (n = 10) is 2552.
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CROSSREFS
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Cf. A002522, A033816
Sequence in context: A014819 A033155 A132117 this_sequence A053348 A019256 A014969
Adjacent sequences: A159938 A159939 A159940 this_sequence A159942 A159943 A159944
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KEYWORD
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nonn
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 26 2009
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