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A000627
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Number of non-stereoisomeric paraffins with n carbon atoms.
(Formerly M0674 N0249)
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3
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1, 1, 1, 2, 3, 5, 7, 13, 20, 35, 55, 96, 156, 267, 438, 747, 1239, 2099, 3498, 5912, 9890, 16677, 27951, 47084, 79019, 133003, 223373, 375824, 631477, 1062160, 1785159, 3002227, 5046641, 8486453, 14266795, 23989770, 40332184, 67816640, 114018876, 191713441, 322330987, 541966582
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| C. M. Blair and H. R. Henze, The number of stereoisomeric and non-stereoisomeric paraffin hydrocarbons, J. Amer. Chem. Soc., 54 (1932), 1538-1545.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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FORMULA
| Reference gives recurrence.
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CROSSREFS
| Cf. A000626, A000628.
Sequence in context: A104189 A178570 A119717 * A181526 A163487 A048413
Adjacent sequences: A000624 A000625 A000626 * A000628 A000629 A000630
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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
| Corrected and extended by Tom Zeller (tzellera(AT)aim.com), Jun 01 2006
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