A199585 - OEIS

A199585

Number of nX3 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to at least one horizontal or vertical neighbor

0, 0, 20, 23, 1951, 60323, 592219, 3399003, 220861580, 6086397307, 79879768821, 386032959689, 29317433209618, 852122544867919, 11206152487777257, 56509336646678083, 4391723268352660596, 130483481066218119340

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

OFFSET

1,3

COMMENTS

Column 3 of A199588

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Some solutions for n=4

..0..0..0....0..0..1....0..0..1....0..0..0....0..1..1....0..1..1....0..0..1

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

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