A196209 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,3,4,1 for x=0,1,2,3,4

17, 43, 42, 305, 751, 2922, 10986, 35529, 128823, 472599, 1687338, 6179264, 22255717, 79844666, 288974977, 1050069655, 3810469340, 13776469497, 49876710085, 180636295947, 654371189198, 2372238997568, 8596886259187

Offset

1,1

Comments

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

Column 7 of A196210

Links

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

Example

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

Crossrefs

Sequence in context: A044094 A044475 A024188 * A196476 A086006 A195685

Adjacent sequences: A196206 A196207 A196208 * A196210 A196211 A196212

Keyword

nonn

Author

R. H. Hardin Sep 29 2011

Status

approved