A196629 - OEIS

A196629

Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4

1, 2, 21, 327, 17278, 2140040, 651323279, 497248017421, 944403244013788, 4486207626875690795

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 4's

Diagonal of A196636

LINKS

EXAMPLE

Some solutions for n=4

..0..2..2..0....0..0..3..0....2..2..0..0....0..0..0..0....0..2..2..0

..0..2..2..0....0..0..0..0....2..2..0..0....0..0..0..3....0..2..2..0

..0..3..0..3....2..2..3..0....0..0..0..0....3..0..0..0....0..0..0..3

..0..0..3..0....2..2..0..0....0..0..3..0....0..0..3..0....0..0..3..0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved