A197430 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,1,1 for x=0,1,2,3,4

25, 2107, 55567, 4017895, 195632425, 9869104795, 529968166606, 27927270266251, 1461399711177586, 76357681634837889, 4016048479413867754, 210995429397329769859, 11066069030221109085243, 581180575552246936955138

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 1's, every 4 is next to 4 1's

Column 7 of A197431

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Example

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

Crossrefs

Sequence in context: A173948 A279276 A197408 * A195272 A266130 A363192

Adjacent sequences: A197427 A197428 A197429 * A197431 A197432 A197433

Keyword

nonn

Author

R. H. Hardin Oct 14 2011

Status

approved