A197455 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,0,2,2 for x=0,1,2,3,4

13, 275, 2887, 53337, 738363, 11014567, 168397471, 2499153985, 37543948067, 563650708913, 8446755201728, 126708291472793, 1900212948780127, 28496971166752387, 427384695145743821, 6409496691822202443

Offset

1,1

Comments

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

Column 7 of A197457

Links

R. H. Hardin, Table of n, a(n) for n = 1..175

Example

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

Crossrefs

Sequence in context: A001658 A034911 A196652 * A196342 A196321 A197306

Adjacent sequences: A197452 A197453 A197454 * A197456 A197457 A197458

Keyword

nonn

Author

R. H. Hardin Oct 15 2011

Status

approved