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Search: id:A005016
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| A005016 |
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Certain subgraphs of a directed graph.
(Formerly M3007)
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+0
1
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| 1, 3, 15, 159, 3903, 214143, 25098495, 6110517759, 3040867308543, 3064498377754623, 6220489664197758975, 25354161321592779612159, 207142125428402158677213183
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Andresen, E.; Kjeldsen, K.; On certain subgraphs of a complete transitively directed graph. Discrete Math. 14 (1976), no. 2, 103-119.
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FORMULA
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G.f.: Sum(x^n*Product((2^i-1)/(1+(2^i-2)*x),i = 1 .. n),n = 0 .. infinity). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Mar 10 2008
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CROSSREFS
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Cf. A005321.
Adjacent sequences: A005013 A005014 A005015 this_sequence A005017 A005018 A005019
Sequence in context: A136519 A102556 A016065 this_sequence A105611 A108975 A097489
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Mar 10 2008
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