A183540 Number of nX7 0..3 arrays with each element equal to either the sum mod 4 of its horizontal and vertical neighbors or the sum mod 4 of its diagonal and antidiagonal neighbors

73, 3996, 146315, 12593728, 299794777

Offset

1,1

Comments

Column 7 of A183541

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 3X7
..2..2..3..0..1..1..0....1..2..1..2..0..0..1....3..0..2..0..0..0..0
..0..2..2..1..2..0..0....2..1..0..0..2..3..1....3..0..1..2..0..0..2
..2..2..2..2..3..3..0....2..0..1..0..3..1..3....0..0..2..1..2..2..0

Crossrefs

Sequence in context: A017736 A221826 A093273 * A022242 A015260 A089788

Adjacent sequences: A183537 A183538 A183539 * A183541 A183542 A183543

Keyword

nonn

Author

R. H. Hardin Jan 05 2011

Status

approved