A223003 Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

14, 391, 13655, 486262, 18420655, 713884175, 28143883707, 1121835123141, 45093000204487, 1824408455268081, 74199480797734648, 3030607349703160325, 124221672704753507355, 5107012096035147244881, 210500491692841318950250

Offset

1,1

Comments

Row 4 of A223000

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Sequence in context: A233094 A211421 A097310 * A228185 A041367 A041364

Adjacent sequences: A223000 A223001 A223002 * A223004 A223005 A223006

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved