A230395 Number of nX4 0..4 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero

0, 0, 82, 3200, 88580, 2467778, 68210356, 1854786186, 50178350064, 1357757826784, 36719604078100, 992781443686032, 26839717495154754, 725595372524892970, 19615802782498931020, 530292387794934229916, 14335868303423900878180

Offset

1,3

Comments

Column 4 of A230398

Links

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

Example

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

Crossrefs

Sequence in context: A234253 A031606 A232904 * A017798 A035736 A017745

Adjacent sequences: A230392 A230393 A230394 * A230396 A230397 A230398

Keyword

nonn

Author

R. H. Hardin, Oct 18 2013

Status

approved