A222575 Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

5, 5, 11, 56, 134, 1500, 3999, 46250, 126987, 1462034, 4136257, 46688904, 136406909, 1501835282, 4510551635, 48637741544, 149382874117, 1583951305266, 4954925376243, 51834151640684, 164570402519621, 1703435934148924

Offset

1,1

Comments

Row 3 of A222573

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

Some solutions for n=3
..0..0..0....0..0..1....0..1..2....0..0..0....0..0..0....0..1..1....0..0..0
..1..0..0....0..0..0....1..1..1....0..0..0....0..0..1....1..1..1....0..0..0
..0..0..0....0..0..0....1..1..1....0..0..1....0..0..0....1..1..1....1..0..0

Crossrefs

Sequence in context: A173316 A242325 A098331 * A222681 A061391 A168336

Adjacent sequences: A222572 A222573 A222574 * A222576 A222577 A222578

Keyword

nonn

Author

R. H. Hardin Feb 25 2013

Status

approved