A222765 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

3, 11, 66, 465, 3431, 25772, 196185, 1508369, 11685222, 91068653, 713197411, 5607868082, 44244333098, 350085423285, 2776997948510, 22076166728109, 175834747565068, 1402892278684566, 11209941707509701, 89696333927946099

Offset

1,1

Comments

Column 4 of A222769

Links

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

Example

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

Crossrefs

Sequence in context: A280775 A303341 A077428 * A326091 A173235 A201259

Adjacent sequences: A222762 A222763 A222764 * A222766 A222767 A222768

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved