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Search: id:A022014
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| A022014 |
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Tri-substituted alkanes of form C_n H_{2n-1} X_2 Y, or equivalently bi-substituted alkyles of form -C_n H_{2n-1} X_2 (n=1: CHXXY; n=2: CXXY-CHHH CXYH-CXHH CXXH-CYHH). |
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1
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| 0, 1, 3, 9, 27, 81, 240, 711, 2094, 6152, 18012, 52613, 153297, 445772, 1293780, 3748820, 10845935, 31336532, 90426198, 260644262, 750502831, 2158961013, 6205225334, 17820505454, 51139664497, 146654181925, 420291420558
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OFFSET
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0,3
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REFERENCES
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G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; line 6 of Table I.
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FORMULA
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Reference gives g.f.
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CROSSREFS
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Adjacent sequences: A022011 A022012 A022013 this_sequence A022015 A022016 A022017
Sequence in context: A006521 A014953 A080557 this_sequence A038002 A133494 A140429
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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), Paul.Zimmermann(AT)loria.fr (Paul Zimmermann)
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