A223117 Number of 4Xn 0..2 arrays with exactly floor(4Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 184, 6676, 244607, 9329085, 361530918, 14237206760, 566959827679, 22771337178098, 920732664014184, 37428247719900736, 1528116180858713458, 62615475463419517018, 2573537658832757981728, 106050487362790924033404

Offset

1,2

Comments

Row 4 of A223114

Links

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

Example

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

Crossrefs

Sequence in context: A121733 A235250 A221931 * A221782 A296780 A035831

Adjacent sequences: A223114 A223115 A223116 * A223118 A223119 A223120

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved