A196949 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,0,2,3 for x=0,1,2,3,4

40, 6440, 393585, 33344883, 2668162530, 215125975535, 17331168379114, 1396952062795238, 112594151426879227, 9074527226180787949, 731362786510896873672, 58944855804404539921648, 4750716841801426807499533

Offset

1,1

Comments

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

Column 7 of A196950

Links

R. H. Hardin, Table of n, a(n) for n = 1..38

Example

Some solutions for n=4
..0..0..0..0..0..0..2....0..0..0..0..2..0..2....0..0..0..2..0..2..1
..0..0..0..0..0..0..0....0..0..0..0..2..0..0....0..0..0..1..1..0..1
..0..0..0..0..0..0..1....0..0..0..1..1..0..2....0..0..0..2..0..0..0
..0..1..1..0..0..0..1....0..1..1..0..0..1..1....0..0..0..1..1..0..0

Crossrefs

Sequence in context: A364507 A196706 A196855 * A201624 A295587 A183766

Adjacent sequences: A196946 A196947 A196948 * A196950 A196951 A196952

Keyword

nonn

Author

R. H. Hardin Oct 08 2011

Status

approved