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Search: id:A127985
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| A127985 |
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Numbers of the form (n/3 + 4/9)2^(n) - 1/2 + (-1)^n/18. |
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+0
1
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| 1, 4, 11, 28, 67, 156, 355, 796, 1763, 3868, 8419, 18204, 39139, 83740, 178403, 378652, 800995, 1689372, 3553507, 7456540, 15612131, 32622364, 68040931, 141674268, 294533347, 611436316, 1267611875, 2624702236, 5428361443
(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/3 + 4/9)2^(n) - 1/2 + (-1)^n/18
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MATHEMATICA
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Table[(n/3 + 4/9)2^(n) - 1/2 + (-1)^n/18, {n, 1, 50}] (*Artur Jasinski*)
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CROSSREFS
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Cf. A073371, A127976, A127978, A127979, A127980, A127981, A127982, A127983, A127984, A073371, A000337.
Sequence in context: A056601 A003230 A099326 this_sequence A005409 A020964 A113067
Adjacent sequences: A127982 A127983 A127984 this_sequence A127986 A127987 A127988
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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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