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Search: id:A119530
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| A119530 |
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Determinant of n X n matrix of first n^2 odious numbers: odd number of 1's in binary expansion (A000069). |
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+0
1
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OFFSET
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1,3
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EXAMPLE
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a(3) = 12 =
|.1..2..4|
|.7..8.11|
|13.14.16|.
a(4) = 0 because of the singular matrix 0 =
|.1..2..4..7|
|.8.11.13.14|
|16.19.21.22|
|25.26.28.31|.
a(6) = 0 because of the singular matrix whose lower right enry is 127.
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CROSSREFS
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Cf. A000069, A119493.
Sequence in context: A048730 A059680 A077351 this_sequence A012332 A012455 A120954
Adjacent sequences: A119527 A119528 A119529 this_sequence A119531 A119532 A119533
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KEYWORD
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easy,sign
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AUTHOR
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Jonathan Vos Post (jvospost2(AT)yahoo.com), May 27 2006
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