A222790 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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