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Search: id:A119514
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| A119514 |
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Determinant of n X n matrix of first n^2 square-free numbers. |
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+0
1
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OFFSET
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1,3
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COMMENT
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The absolute value of a(1) through a(3) and a(5), are squares. None of the absolute values of a(1) through a(8) are themselves square-free.
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EXAMPLE
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a(2) = -1 =
|1 2|
|3 5|.
a(3) = -4 =
|.1..2..3|
|.5..6..7|
|10.11.13|.
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CROSSREFS
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Cf. A005117, A119493.
Sequence in context: A007154 A056410 A056400 this_sequence A102982 A069441 A006344
Adjacent sequences: A119511 A119512 A119513 this_sequence A119515 A119516 A119517
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KEYWORD
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easy,sign
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), May 27 2006
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