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Search: id:A143468
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| 1, -1, 3, -1, 0, 5, 0, -3, 0, 7, -1, 0, 0, 0, 9, 1, -3, -5, 0, 0, 11, -1, 0, 0, 0, 0, 0, 13, 0, 0, 0, -7, 0, 0, 0, 15, 0, 0, -5, 0, 0, 0, 0, 0, 17, 1, -3, 0, 0, -9, 0, 0, 0, 0, 19, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Row sums = A140434: (1, 2, 4, 4, 8, 4, 12, 8, 12,...).
Left border = mu(n), A008683.
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FORMULA
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Triangle read by rows, A054525 * A127775, 1<=k<=n. Mobius transform of an infinite lower triangular matrix with (1, 3, 5, 7,...) in the main diagonal and the rest zeros.
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EXAMPLE
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First few rows of the triangle =
1;
-1, 3;
-1, 0, 5;
0, -3, 0, 7;
-1, 0, 0, 0, 9;
1, -3, -5, 0, 0, 11;
-1, 0, 0, 0, 0, 0, 13;
...
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CROSSREFS
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Cf. A127775, A054525, A140434, A008683.
Sequence in context: A117372 A127570 A045406 this_sequence A133728 A127627 A154792
Adjacent sequences: A143465 A143466 A143467 this_sequence A143469 A143470 A143471
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KEYWORD
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tabl,sign
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 17 2008
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