|
|
A265681
|
|
Number of 4Xn arrays containing n copies of 0..4-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
|
|
1
|
|
|
1, 23, 632, 20592, 734400, 27705984, 1086831962, 43880429586, 1811403496610, 76104309064345, 3243585449869690, 139894941451780572, 6094362820563358094, 267775378869795256077, 11852898175993602480090, 528058236407010277514014
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..0..1..1....0..0..1..2....0..1..0..2....0..1..0..0....0..1..2..2
..2..3..3..0....3..2..3..0....3..3..1..1....2..3..1..1....3..3..0..0
..1..0..1..3....1..1..2..2....2..2..3..2....1..2..0..3....2..1..3..3
..2..3..2..2....3..0..3..1....3..0..1..0....3..3..2..2....0..2..1..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|