A230511 Number of nX4 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero

0, 2, 170, 4648, 129874, 4038314, 129829460, 4177480490, 133348597190, 4239583476464, 134710145140230, 4281665864448554, 136114979870612832, 4327211619948091138, 137562471021655686798, 4373060580042549915844

Offset

1,2

Comments

Column 4 of A230513

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=3
..0..1..2..3....0..1..2..3....0..3..2..1....0..1..0..7....0..7..0..7
..7..0..1..4....5..0..7..4....1..4..5..0....1..2..3..4....1..2..1..6
..6..7..6..5....6..7..6..5....2..3..6..7....0..7..6..5....2..3..4..5

Crossrefs

Sequence in context: A005020 A157316 A007760 * A209607 A243230 A051030

Adjacent sequences: A230508 A230509 A230510 * A230512 A230513 A230514

Keyword

nonn

Author

R. H. Hardin, Oct 21 2013

Status

approved