A222719 - OEIS

A222719

Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 30, 1683, 88552, 2807505, 173596622, 5700425842, 361481561727, 11854580368227, 768495821905378, 25268983469852703, 1660963025457136586, 54720903080516442190, 3632596805120259336310, 119870557565384807413087

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

OFFSET

1,2

COMMENTS

Column 3 of A222722

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..67

EXAMPLE

Some solutions for n=3

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

..2..1..0....1..3..1....1..2..1....1..2..0....2..0..1....0..2..0....1..1..3

..0..3..1....3..2..0....2..0..3....3..1..3....1..2..2....0..1..3....2..1..0