A197671 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,0,1 for x=0,1,2,3,4

25, 1963, 74812, 3675345, 178113620, 8613257822, 417293944115, 20252638815131, 981414876628367, 47569549221404522, 2306162325188337684, 111794015697526614448, 5419263655984491978357, 262704965350074163519109

Offset

1,1

Comments

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

Column 7 of A197672

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

Some solutions containing all values 0 to 4 for n=4
..0..3..0..2..1..0..1....0..0..2..1..1..1..1....0..3..0..2..1..0..0
..0..0..0..1..4..1..1....1..1..1..0..0..0..0....3..0..0..1..4..1..1
..0..3..0..2..1..1..0....1..1..4..1..3..0..3....0..3..0..1..1..1..2
..1..1..0..0..0..2..1....0..0..1..1..0..0..0....1..2..1..1..0..0..0

Crossrefs

Sequence in context: A177837 A056047 A281436 * A051112 A061843 A173948

Adjacent sequences: A197668 A197669 A197670 * A197672 A197673 A197674

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved