A230576 Number of 7Xn 0..4 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero

0, 0, 0, 58474, 98987768, 67978636208, 34266592666538, 17991771309348534, 9155613751914545266, 4619389107348901275470

Offset

1,4

Comments

Row 7 of A230571

Links

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

Example

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

Crossrefs

Sequence in context: A295448 A220987 A273318 * A075980 A031684 A031657

Adjacent sequences: A230573 A230574 A230575 * A230577 A230578 A230579

Keyword

nonn

Author

R. H. Hardin, Oct 23 2013

Status

approved