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Search: id:A007557
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| A007557 |
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Shifts left when inverse Moebius transform applied twice.
(Formerly M2458)
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+0
2
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| 1, 1, 3, 5, 10, 12, 24, 26, 43, 52, 78, 80, 133, 135, 189, 219, 295, 297, 428, 430, 584, 642, 804, 806, 1100, 1123, 1395, 1494, 1856, 1858, 2428, 2430, 2977, 3143, 3739, 3811, 4790, 4792, 5654, 5930, 7072, 7074, 8656
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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Equals eigensequence of triangle A127170 (the square of the inverse Mobius transform). [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 27 2009]
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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).
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LINKS
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M. Bernstein and N. J. A. Sloane, Some canonical sequences of integers, Linear Alg. Applications, 226-228 (1995), 57-72; erratum 320 (2000), 210.
N. J. A. Sloane, Transforms
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FORMULA
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a(n+1) = Sum_{d divides n} tau(n/d)*a(d). - Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 24 2003
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CROSSREFS
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Cf. A000005, A007554, A038045, A038046, A003238, A070965.
A127170 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 27 2009]
Sequence in context: A047389 A093661 A080561 this_sequence A034746 A080931 A165718
Adjacent sequences: A007554 A007555 A007556 this_sequence A007558 A007559 A007560
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KEYWORD
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nonn,nice,eigen
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 24 2003
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