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Search: id:A034921
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| A034921 |
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Number of different determinants of n X n persymmetric matrices with entries {-1,0,+1}. |
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+0
5
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OFFSET
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1,1
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COMMENT
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A persymmetric (or Hankel) matrix has M[ i,j ] = M[ i-k,j+k ] for all i and j (matrix is constant along antidiagonals).
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EXAMPLE
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For n = 1 and 2 the possible values for the determinant are {-1, 0, 1} and {-2, -1, 0, 1}.
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CROSSREFS
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Cf. A034917-A034920.
Sequence in context: A049976 A032789 A089243 this_sequence A038222 A038629 A105229
Adjacent sequences: A034918 A034919 A034920 this_sequence A034922 A034923 A034924
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KEYWORD
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nonn,nice,more
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AUTHOR
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Fred Lunnon (fred(AT)csa5.cs.may.ie)
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EXTENSIONS
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More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 08 2006
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