A222788 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 3, 8, 55, 294, 1883, 11920, 78255, 517050, 3451712, 23156964, 156076271, 1055435486, 7157673375, 48656943008, 331450961443, 2261939399694, 15461147598417, 105834401893220, 725394224374344, 4977715076045096

Offset

1,2

Comments

Column 2 of A222794

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A322461 A192647 A121567 * A308572 A101361 A104034

Adjacent sequences: A222785 A222786 A222787 * A222789 A222790 A222791

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved