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Search: id:A127505
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| A127505 |
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Triangle, left column = mu(n), right border = phi(n). |
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+0
1
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| 1, -1, 1, -1, 0, 2, 0, -1, 0, 2, -1, 0, 0, 0, 4, 1, -1, -2, 0, 0, 2, -1, 0, 0, 0, 0, 0, 6, 0, 0, 0, -2, 0, 0, 0, 4, 0, 0, -2, 0, 0, 0, 0, 0, 6, 1, -1, 0, 0, -4, 0, 0, 0, 0, 4
(list; table; graph; listen)
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OFFSET
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1,6
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COMMENT
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Left column = mu(n), A008683; right border = phi(n), A000010; row sums = A007431: (1, 0, 1, 1, 3, 0, 5,...).
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FORMULA
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Mobius transform of M, where M = an infinite lower triangular matrix with phi(n) in the main diagonal and the rest zeros.
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EXAMPLE
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First few rows of the triangle are:
1;
-1, 1;
-1, 0, 2;
0, -1, 0, 2;
-1, 0, 0, 0, 4;
1, -1, -2, 0, 0, 2;
...
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CROSSREFS
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Cf. A051731, A000010, A007431.
Sequence in context: A158945 A156667 A110914 this_sequence A138036 A086372 A089650
Adjacent sequences: A127502 A127503 A127504 this_sequence A127506 A127507 A127508
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KEYWORD
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tabl,uned,sign
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 17 2007
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