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Search: id:A127511
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| 1, -2, -4, 0, -16, 32, -64, 0, 0, 512, -1024, 0, -4096, 8192, 16384, 0, -65536, 0, -262144, 0, 1048576, 2097152, -4194304, 0, 0, 33554432, 0, 0, -268435456, -536870912, -1073741824, 0, 4294967296, 8589934592, 17179869184, 0, -68719476736, 137438953472, 274877906944, 0, -1099511627776
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums of A127512.
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FORMULA
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a(n)=A008683(n)*A000079(n-1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 19 2007
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EXAMPLE
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a(5) = (-1)*16 = -16 since mu(5) = -1 and 2^4 = 16.
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MAPLE
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A127511 := proc(n) 2^(n-1)*numtheory[mobius](n) ; end: for n from 1 to 50 do printf("%d, ", A127511(n)) ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 19 2007
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CROSSREFS
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Cf. A008683, A127512.
Sequence in context: A078022 A106603 A059057 this_sequence A009170 A009625 A055871
Adjacent sequences: A127508 A127509 A127510 this_sequence A127512 A127513 A127514
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KEYWORD
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sign,easy
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 17 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 19 2007
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