A230249 Number of nX6 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 upper left element zero

0, 522, 64838, 15075834, 2905031942, 575915716590, 113395635811566, 22307089878854146, 4393204701131698706, 865095876749918611674, 170331251165790970494850, 33537951155031500480807238

Offset

1,2

Comments

Column 6 of A230250

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Sequence in context: A263306 A128809 A279926 * A231284 A145497 A142778

Adjacent sequences: A230246 A230247 A230248 * A230250 A230251 A230252

Keyword

nonn

Author

R. H. Hardin, Oct 13 2013

Status

approved