A184149 1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically

746503, 676507975, 595270788529, 526180845527509, 464796062784203293, 410618317896670998877, 362749037617728870936121, 320461324635255992201246287, 283103168549661733499693130559

Offset

1,1

Comments

Column 5 of A184153

Links

R. H. Hardin, Table of n, a(n) for n = 1..98

Example

Some solutions for 3X6 with a(1,1)=0
..0..0..0..2..1..0....0..0..0..0..2..3....0..0..0..0..3..1....0..0..0..2..2..2
..0..0..0..2..1..1....0..0..0..1..1..1....0..0..0..0..2..2....0..0..0..0..2..3
..0..0..3..2..2..1....0..0..0..3..0..2....0..0..3..0..3..3....0..0..0..0..2..3

Crossrefs

Sequence in context: A147707 A133183 A119403 * A339105 A133979 A352345

Adjacent sequences: A184146 A184147 A184148 * A184150 A184151 A184152

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved