A197528 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,4,1,0,1 for x=0,1,2,3,4

1, 99, 5048, 74637, 2818424, 73297686, 2095251333, 58226014909, 1640490253969, 46006820800296, 1290659247439150, 36216071381563588, 1016338870833268879, 28519809510464622005, 800263279008322539229, 22456612946242234293115

Offset

1,2

Comments

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

Column 7 of A197529

Links

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

Example

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

Crossrefs

Sequence in context: A017815 A017762 A265375 * A196221 A069363 A163051

Adjacent sequences: A197525 A197526 A197527 * A197529 A197530 A197531

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved