A222699 Number of nX4 0..1 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order

4, 16, 62, 359, 2002, 12101, 73901, 460669, 2883822, 18178638, 115115070, 732065684, 4669781881, 29871691523, 191531922013, 1230676513191, 7922040025606, 51078922635855, 329820795489509, 2132486033946106

Offset

1,1

Comments

Column 4 of A222703

Links

R. H. Hardin, Table of n, a(n) for n = 1..181

Example

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

Crossrefs

Sequence in context: A206839 A244827 A169760 * A034542 A289594 A333071

Adjacent sequences: A222696 A222697 A222698 * A222700 A222701 A222702

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved