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Search: id:A127981
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| A127981 |
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Numbers of the form (n + 1/3)2^(n - 1) - 1/2 + ((-1)^(n - 1) )(1/6). |
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+0
4
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| 1, 4, 13, 34, 85, 202, 469, 1066, 2389, 5290, 11605, 25258, 54613, 117418, 251221, 535210, 1135957, 2402986, 5068117, 10660522, 22369621, 46836394, 97867093, 204122794, 425022805, 883600042, 1834308949, 3802835626, 7874106709
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Bosma W. 2001. Signed bits and fast exponentiation. J. Th. des Nombres de Bordeaux Vol.13, Fasc. 1
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LINKS
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Bosma W. Signed bits and fast exponentiation.
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FORMULA
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a(n) = (n + 1/3)2^(n - 1) - 1/2 + ((-1)^(n - 1) )(1/6)
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MATHEMATICA
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Table[(n + 1/3)2^(n - 1) - 1/2 + ((-1)^(n - 1) )(1/6), {n, 1, 50}] (*Artur Jasinski*)
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CROSSREFS
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Cf. A073371, A127976, A127978, A127979, A127980, A073371.
Adjacent sequences: A127978 A127979 A127980 this_sequence A127982 A127983 A127984
Sequence in context: A135859 A101946 A029860 this_sequence A089453 A057159 A095941
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Feb 09 2007
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