A222790 Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

3, 18, 275, 5896, 137804, 3315998, 80934417, 1992934141, 49390328481, 1230248849616, 30772191192457, 772421301648384, 19447340783043671, 490908234855685636, 12420271942780692035, 314872108569518327475

Offset

1,1

Comments

Column 4 of A222794

Links

R. H. Hardin, Table of n, a(n) for n = 1..138

Example

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

Crossrefs

Sequence in context: A327231 A279490 A299431 * A128775 A102100 A083000

Adjacent sequences: A222787 A222788 A222789 * A222791 A222792 A222793

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved