A196681 Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,2,3 for x=0,1,2,3,4.

5, 61, 292, 2245, 15395, 109528, 796557, 5702355, 40479328, 289195575, 2074543871, 14876511544, 106491873717, 761738952927, 5453371319038, 39065425553179, 279802106777205, 2003379491308618, 14343725864416775, 102713433223681069

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 2's, every 4 is next to 4 3's.

Column 4 of A196685.

Links

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

Example

Some solutions for n=5
..0..2..1..2....1..0..0..1....1..1..0..0....0..0..1..2....0..0..1..1
..1..1..0..1....1..0..0..1....0..1..2..0....0..0..1..1....1..1..1..0
..2..2..0..1....2..0..2..1....1..1..1..1....1..1..2..0....1..1..1..2
..1..1..0..1....1..2..1..0....1..0..0..1....2..1..0..0....0..0..0..1
..0..2..1..2....0..0..1..1....2..1..1..2....0..2..1..1....1..1..1..2

Crossrefs

Cf. A196685.

Sequence in context: A092838 A196296 A196214 * A281713 A060060 A183379

Adjacent sequences: A196678 A196679 A196680 * A196682 A196683 A196684

Keyword

nonn

Author

R. H. Hardin Oct 05 2011

Status

approved