A231062 Number of nX7 0..3 arrays x(i,j) with each element horizontally or vertically 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, 47998, 3607664, 270096962, 20286249268, 1524513500124, 114623595936566, 8620079317973610, 648336326622533098, 48765953333817735404, 3668154457146990333796, 275921956841908575609620

Offset

1,2

Comments

Column 7 of A231063

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

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

Crossrefs

Sequence in context: A237162 A252529 A008746 * A200559 A231252 A341190

Adjacent sequences: A231059 A231060 A231061 * A231063 A231064 A231065

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved