login
A087519
Number of arrangements of 1..n^2 in n X n array with one local minimum and one local maximum.
1
1, 16, 3584, 58566144
OFFSET
1,2
COMMENTS
Neighbors of a cell are only considered in the X and Y directions.
EXAMPLE
For n=2, 12 has one local max. whereas 13 has two local maxima
........ 34 and one local min. ....... 42 and two local minima
CROSSREFS
Cf. A087518.
Sequence in context: A003773 A217021 A375121 * A367535 A222917 A060616
KEYWORD
nonn,nice
AUTHOR
R. H. Hardin, Oct 23 2003
STATUS
approved