|
Search: id:A062528
|
|
|
| A062528 |
|
Number of ways to fill an n X n matrix with numbers 1, 2, ..., n*n such that each row and each column is decreasing or increasing. |
|
+0
2
|
| |
|
|
OFFSET
|
1,2
|
|
|
EXAMPLE
|
a(2) = 4! = 24 because every arrangement of the four elements of a 2 X 2 matrix satisfies the conditions.
|
|
CROSSREFS
|
Cf. A039622.
Adjacent sequences: A062525 A062526 A062527 this_sequence A062529 A062530 A062531
Sequence in context: A093456 A105187 A062313 this_sequence A078522 A005149 A027411
|
|
KEYWORD
|
nonn,more,nice
|
|
AUTHOR
|
Floor van Lamoen (fvlamoen(AT)hotmail.com), Jul 10 2001
|
|
EXTENSIONS
|
a(3) changed from 5320 to 736 by Ron Hardin, Feb 17, 2002
|
|
|
Search completed in 0.002 seconds
|
