|
|
A220200
|
|
Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array
|
|
1
|
|
|
20, 89, 956, 6855, 44886, 303148, 2089805, 14021160, 88828793, 530514956, 3025654183, 16666381611, 89072121670, 462114159737, 2327673032529, 11394626760089, 54291971399557, 252137513999724, 1142599192201196
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..0..0..0....2..1..1..1....1..0..0..0....1..1..1..1....1..1..0..0
..1..0..0..0....1..1..1..1....2..1..0..0....1..1..1..1....2..1..1..0
..3..3..3..2....1..1..1..3....3..3..2..2....3..1..1..2....3..3..3..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|