A222631 Number of nX4 0..1 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order

4, 10, 34, 161, 707, 3309, 16892, 89384, 465258, 2414240, 12658133, 66882546, 353898321, 1874207359, 9950624881, 52968141606, 282452336722, 1508213363988, 8064519904852, 43179574656064, 231467793567740, 1242085617391923

Offset

1,1

Comments

Column 4 of A222635

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Sequence in context: A149173 A149174 A283070 * A030003 A339845 A363465

Adjacent sequences: A222628 A222629 A222630 * A222632 A222633 A222634

Keyword

nonn

Author

R. H. Hardin Feb 26 2013

Status

approved