A230512 Number of nX5 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, 8, 1716, 129874, 10308020, 918775180, 84808478358, 7687975511996

Offset

1,2

Comments

Column 5 of A230513

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A230913 A163017 A221136 * A295023 A017295 A154713

Adjacent sequences: A230509 A230510 A230511 * A230513 A230514 A230515

Keyword

nonn

Author

R. H. Hardin, Oct 21 2013

Status

approved