A222998 - OEIS

A222998

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

10, 272, 11114, 486262, 21692365, 982879508, 45079248621, 2086133257739, 97208417340361, 4554539931346382, 214352375573013156, 10125794195099126318, 479840435995427044060, 22800045065517001638699, 1085898615393818008179596

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

OFFSET

1,1

COMMENTS

Column 4 of A223000

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..58

EXAMPLE

Some solutions for n=3

..0..1..1..0....0..1..2..0....0..1..2..1....0..1..0..2....0..1..0..2

..1..2..1..1....2..0..2..1....2..1..0..1....0..1..2..0....2..0..1..0

..0..2..0..1....1..2..2..1....2..0..0..0....0..1..2..2....2..0..1..2