A197449 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4

16, 957, 88767, 6455759, 504568165, 40087361395, 3148323076125, 247785141871837, 19514460176530843, 1536223846055481075, 120945067934443941208, 9522042330180130196817, 749659600975504964938552

Offset

1,1

Comments

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

Column 7 of A197450

Links

R. H. Hardin, Table of n, a(n) for n = 1..158

Example

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

Crossrefs

Sequence in context: A211105 A276637 A211081 * A264640 A211086 A187802

Adjacent sequences: A197446 A197447 A197448 * A197450 A197451 A197452

Keyword

nonn

Author

R. H. Hardin Oct 15 2011

Status

approved