A231252 Number of 7Xn 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, no adjacent elements equal, and upper left element zero

0, 778, 185074, 12322784, 1130422470, 122516675112, 13176773912306, 1401330180537464, 149128308807116274, 15891308131288905986, 1693734891060505493574, 180514807902138511042510

Offset

1,2

Comments

Row 7 of A231246

Links

R. H. Hardin, Table of n, a(n) for n = 1..59

Example

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

Crossrefs

Sequence in context: A008746 A231062 A200559 * A341190 A147547 A259924

Adjacent sequences: A231249 A231250 A231251 * A231253 A231254 A231255

Keyword

nonn

Author

R. H. Hardin, Nov 06 2013

Status

approved