A231053 Number of 5Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero

0, 22, 2430, 18688, 344136, 10631552, 274004640, 6591073664, 162458658900, 4045673867452, 100391649169040, 2487331534394008, 61659987625594416, 1528888686849171692, 37906407338692090040, 939795970497387880692

Offset

1,2

Comments

Row 5 of A231049

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A117990 A098130 A078278 * A078275 A200805 A128854

Adjacent sequences: A231050 A231051 A231052 * A231054 A231055 A231056

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved