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Search: id:A127980
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| A127980 |
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Numbers of the form (n + 2/3)2^(n - 1) - 1/2 - ((-1)^(n - 1) )(1/6). |
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+0
6
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| 1, 5, 14, 37, 90, 213, 490, 1109, 2474, 5461, 11946, 25941, 55978, 120149, 256682, 546133, 1157802, 2446677, 5155498, 10835285, 22719146, 47535445, 99265194, 206918997, 430615210, 894784853, 1856678570, 3847574869, 7963585194
(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 + 2/3)2^(n - 1) - 1/2 - ((-1)^(n - 1) )(1/6)
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MATHEMATICA
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Table[(n + 2/3)2^(n - 1) - 1/2 - ((-1)^(n - 1) )(1/6), {n, 1, 50}], {n, 1, 100}] (*Artur Jasinski*)
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CROSSREFS
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Cf. A073371, A127976, A127978, A127979, A073371.
Sequence in context: A097507 A052951 A048745 this_sequence A054486 A072130 A045553
Adjacent sequences: A127977 A127978 A127979 this_sequence A127981 A127982 A127983
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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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