A222998 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

10, 272, 11114, 486262, 21692365, 982879508, 45079248621, 2086133257739, 97208417340361, 4554539931346382, 214352375573013156, 10125794195099126318, 479840435995427044060, 22800045065517001638699, 1085898615393818008179596

Offset

1,1

Comments

Column 4 of A223000

Links

R. H. Hardin, Table of n, a(n) for n = 1..58

Example

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

Crossrefs

Sequence in context: A287317 A084943 A055055 * A368770 A221526 A153331

Adjacent sequences: A222995 A222996 A222997 * A222999 A223000 A223001

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved