A196903 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,1,0,2 for x=0,1,2,3,4

1, 99, 4768, 141833, 5598122, 216042764, 8351540397, 321111082107, 12356839088825, 475267463574534, 18301760788493413, 704261042875463142, 27105588968030124804, 1043189030239853499999, 40149431446819879902095

Offset

1,2

Comments

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

Column 7 of A196904

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for n=4
..0..0..0..3..0..0..0....0..0..0..0..0..3..0....0..0..0..0..0..0..0
..3..0..3..0..1..0..3....1..3..0..0..0..0..3....3..0..1..0..3..3..0
..0..0..1..0..3..0..0....0..0..0..0..3..1..0....0..0..3..0..0..0..3
..0..0..0..3..0..3..0....0..3..0..3..0..0..0....0..0..0..0..3..0..0

Crossrefs

Sequence in context: A163040 A133319 A196745 * A017815 A017762 A265375

Adjacent sequences: A196900 A196901 A196902 * A196904 A196905 A196906

Keyword

nonn

Author

R. H. Hardin Oct 07 2011

Status

approved