A230896 Number of nX5 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 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero

0, 22, 198, 2722, 40762, 579218, 8554562, 124839450, 1831199914, 26824899050, 393121474162, 5761002173582, 84425792197234, 1237258764791130, 18131988405606650, 265725095549831286, 3894214169501544162

Offset

1,2

Comments

Column 5 of A230899

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A110690 A020923 A254470 * A031202 A376946 A274982

Adjacent sequences: A230893 A230894 A230895 * A230897 A230898 A230899

Keyword

nonn

Author

R. H. Hardin, Oct 31 2013

Status

approved