|
|
A206842
|
|
Number of 4Xn 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
|
|
1
|
|
|
241, 58081, 11086238, 2152805235, 418964575189, 81562078260316, 15877946803718090, 3091067307303254867, 601761995188912369335, 117150369608909238252579, 22806723149404940748682374
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=5
..0..1..3..3..2....2..3..0..3..0....0..1..0..2..1....1..3..3..3..3
..0..1..3..2..3....1..3..0..1..1....0..0..1..1..0....2..1..3..1..1
..3..2..1..2..0....1..0..3..1..0....2..2..0..0..1....0..1..3..3..1
..0..0..0..0..0....0..1..3..2..0....1..1..2..0..0....2..1..1..3..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|