A197216 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4

1, 73, 1537, 30940, 706153, 15034832, 322715244, 6984694296, 150562726618, 3245505223710, 70004837612015, 1509763068769076, 32557618945328577, 702121520920633674, 15141824337674655027, 326544294704293876446

Offset

1,2

Comments

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

Column 7 of A197217

Links

R. H. Hardin, Table of n, a(n) for n = 1..188

Example

Some solutions for n=4
..0..0..1..0..0..1..0....0..2..2..1..3..1..0....0..0..0..0..0..0..0
..1..1..3..1..1..3..1....0..2..2..0..1..0..1....2..2..0..1..3..1..0
..3..1..0..0..1..0..0....0..1..3..1..1..1..3....2..2..1..0..1..0..0
..1..0..0..1..3..1..0....0..0..1..1..3..1..1....0..1..3..1..0..0..0

Crossrefs

Sequence in context: A253263 A098676 A056214 * A197502 A197241 A332948

Adjacent sequences: A197213 A197214 A197215 * A197217 A197218 A197219

Keyword

nonn

Author

R. H. Hardin Oct 11 2011

Status

approved