A197804 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,0,1 for x=0,1,2,3,4

9, 1601, 139212, 12108247, 1067467454, 94343594548, 8356101105886, 738902613491053, 65378440919070707, 5783165458408517862, 511560923077285542005, 45254949485645786464236, 4003399792733695557796480

Offset

1,1

Comments

Every 0 is next to 0 4's, every 1 is next to 1 2'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 A197805

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

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

Crossrefs

Sequence in context: A187131 A167774 A197206 * A047944 A322245 A251700

Adjacent sequences: A197801 A197802 A197803 * A197805 A197806 A197807

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved