A222505 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order

3, 3, 15, 84, 497, 2862, 15420, 86570, 484976, 2751326, 15597305, 89022483, 508390703, 2915183250, 16739260404, 96360825455, 555513635334, 3208071753051, 18550893260858, 107413402302763, 622649366897782, 3613180083184007

Offset

1,1

Comments

Column 4 of A222509

Links

R. H. Hardin, Table of n, a(n) for n = 1..177

Example

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

Crossrefs

Sequence in context: A089403 A239600 A111674 * A292356 A370869 A209020

Adjacent sequences: A222502 A222503 A222504 * A222506 A222507 A222508

Keyword

nonn

Author

R. H. Hardin Feb 23 2013

Status

approved