A223006 Number of nX2 0..1 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

1, 4, 10, 34, 101, 331, 1044, 3406, 11008, 36039, 117866, 387709, 1276783, 4217763, 13954040, 46258390, 153562565, 510523621, 1699272620, 5662498639, 18888082230, 63062936820, 210730527620, 704727803329, 2358457291626, 7898146040191

Offset

1,2

Comments

Column 2 of A223012

Links

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

Example

All solutions for n=3
..0..0....0..0....0..0....0..0....0..0....0..0....0..1....0..0....0..1....0..0
..0..0....0..1....1..1....1..0....0..0....0..0....0..0....0..1....1..1....0..0
..0..1....0..0....1..1....0..0....1..0....1..1....0..0....1..1....1..1....0..0

Crossrefs

Sequence in context: A140725 A005630 A100507 * A156700 A274479 A231524

Adjacent sequences: A223003 A223004 A223005 * A223007 A223008 A223009

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved