A223008 - OEIS

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A223008

Number of nX4 0..1 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

4, 18, 117, 840, 6240, 47139, 360347, 2779528, 21588898, 168613534, 1322868729, 10417760419, 82302522544, 651981307285, 5177047812119, 41193230296706, 328367767613750, 2621791862367316, 20963552382355484, 167840827307586780

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

OFFSET

1,1

COMMENTS

Column 4 of A223012

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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