A222827 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

11, 1154, 163059, 23664739, 3489313607, 520160675223, 78214529020708, 11843031775865125, 1803481044258862295, 275936349234703904616, 42386246052840276405669, 6532812606151325343712993

Offset

1,1

Comments

Column 4 of A222828

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

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

Crossrefs

Sequence in context: A090507 A177068 A358149 * A067105 A237695 A180581

Adjacent sequences: A222824 A222825 A222826 * A222828 A222829 A222830

Keyword

nonn

Author

R. H. Hardin Mar 06 2013

Status

approved