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A034919 Minimal consecutive determinant (negated) of n X n persymmetric matrix with entries {-1,0,+1}. 4
1, 2, 4, 8, 28, 86, 325, 836, 4764, 20077, 92417, 295457 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
A persymmetric (or Hankel) matrix has M[ i,j ] = M[ i-k,j+k ] for all i and j (matrix is constant along antidiagonals).
I would love to find out what "consecutive" means here! Adjacent entries along the top row and right side must be consecutive? - N. J. A. Sloane, May 16 2003
Interpretation: largest m such that for each d for which -m <= d <= 0 a matrix with determinant d exists. - Bert Dobbelaere, Jan 26 2019
LINKS
CROSSREFS
Sequence in context: A302915 A259135 A219969 * A298682 A151340 A134316
KEYWORD
nonn,more
AUTHOR
Fred Lunnon, Dec 11 1999
EXTENSIONS
a(7)-a(12) from Bert Dobbelaere, Jan 26 2019
STATUS
approved

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Last modified April 14 09:38 EDT 2024. Contains 371657 sequences. (Running on oeis4.)