A199223 - OEIS

A199223

Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors

1, 1, 1, 6, 15, 15, 90, 226, 219, 1436, 3671, 3514, 24039, 62130, 58962, 415608, 1082718, 1021368, 7354732, 19274263, 18101068, 132456534, 348731568, 326374830, 2418406938, 6390767156, 5964605638, 44643259798, 118329627186, 110190867844

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

OFFSET

1,4

COMMENTS

Column 1 of A199230

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..175

EXAMPLE

Some solutions for n=6

..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

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

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