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Search: id:A006155
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| A006155 |
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Expansion of 1/(2-x-e^x).
(Formerly M1945)
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+0
2
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| 1, 2, 9, 61, 551, 6221, 84285, 1332255, 24066691, 489100297, 11044268633, 274327080611, 7433424980943, 218208342366093, 6898241919264181, 233651576126946103, 8441657595745501019, 324052733365292875025
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Getu, S.; Shapiro, L. W.; Combinatorial view of the composition of functions. Ars Combin. 10 (1980), 131-145.
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LINKS
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INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 157
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FORMULA
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E.g.f.: 1/(2-x-exp(x)).
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CROSSREFS
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Cf. A032112.
Sequence in context: A053983 A107883 A088182 this_sequence A121870 A146887 A113662
Adjacent sequences: A006152 A006153 A006154 this_sequence A006156 A006157 A006158
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KEYWORD
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nonn,easy
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AUTHOR
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Simon Plouffe (simon.plouffe(AT)gmail.com)
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EXTENSIONS
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More terms from Ralf Stephan, Mar 12 2004
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