A222670 Number of nX5 0..2 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

4, 24, 90, 2370, 17696, 426362, 4030527, 115311310, 1138939624, 33371066606, 333504416113, 9869885381863, 98742842374798, 2936314625332784, 29380754050688425, 877025222448714052, 8774880700816611500

Offset

1,1

Comments

Column 5 of A222673

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Example

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

Crossrefs

Sequence in context: A026967 A026977 A026952 * A225681 A259814 A009769

Adjacent sequences: A222667 A222668 A222669 * A222671 A222672 A222673

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved