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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

Table of n, a(n) for n=1..12.

CROSSREFS

Cf. A034917, A034918, A034920, A034921.

Sequence in context: A302915 A259135 A219969 * A298682 A151340 A134316

Adjacent sequences:  A034916 A034917 A034918 * A034920 A034921 A034922

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 September 26 10:50 EDT 2022. Contains 356997 sequences. (Running on oeis4.)