|
| |
|
|
A034921
|
|
Number of different determinants of n X n persymmetric matrices with entries {-1,0,+1}.
|
|
4
| | |
|
|
|
OFFSET
| 1,1
|
|
|
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).
|
|
|
EXAMPLE
| For n = 1 and 2 the possible values for the determinant are {-1, 0, 1} and {-2, -1, 0, 1}.
|
|
|
CROSSREFS
| Cf. A034917-A034920.
Sequence in context: A049976 A032789 A089243 * A038222 A038629 A105229
Adjacent sequences: A034918 A034919 A034920 * A034922 A034923 A034924
|
|
|
KEYWORD
| nonn,nice,more
|
|
|
AUTHOR
| Fred Lunnon (fred(AT)csa5.cs.may.ie)
|
|
|
EXTENSIONS
| More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 08 2006
|
| |
|
|
