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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 1
4, 10, 34, 161, 707, 3309, 16892, 89384, 465258, 2414240, 12658133, 66882546, 353898321, 1874207359, 9950624881, 52968141606, 282452336722, 1508213363988, 8064519904852, 43179574656064, 231467793567740, 1242085617391923 (list; graph; refs; listen; history; text; internal format)
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 A234009

Adjacent sequences: A222628 A222629 A222630 * A222632 A222633 A222634

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2013

STATUS

approved

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Last modified March 26 16:50 EDT 2023. Contains 361549 sequences. (Running on oeis4.)