A196965 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,2,0,3 for x=0,1,2,3,4

9, 449, 17966, 634241, 24281566, 906566345, 33928210026, 1276381991598, 47878302949552, 1796412252140585, 67423941362664276, 2530227381866900256, 94953390054212557512, 3563426148443173137440, 133727820453911745380230

Offset

1,1

Comments

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

Column 6 of A196967

Links

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

Example

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

Crossrefs

Sequence in context: A173954 A239479 A229625 * A069073 A156086 A160478

Adjacent sequences: A196962 A196963 A196964 * A196966 A196967 A196968

Keyword

nonn

Author

R. H. Hardin Oct 08 2011

Status

approved