A230689 Number of 5Xn 0..6 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero

0, 0, 0, 32, 15624, 2756394, 296568384, 24842737670, 1968730639226, 156736534647626

Offset

1,4

Comments

Row 5 of A230686

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A062315 A221254 A159384 * A248002 A091201 A121913

Adjacent sequences: A230686 A230687 A230688 * A230690 A230691 A230692

Keyword

nonn

Author

R. H. Hardin, Oct 27 2013

Status

approved