A184151 1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically

97806031, 783273204631, 6038729388705523, 46821946289531019895, 362749037617728870936121, 2810726734347901488302111479

Offset

1,1

Comments

Column 7 of A184153

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3X8 with a(1,1)=0
..0..0..0..0..0..1..3..1....0..0..0..0..0..0..3..1....0..0..0..0..0..1..1..1
..0..0..0..0..0..1..3..3....0..0..0..0..0..0..2..1....0..0..0..0..0..0..1..1
..0..0..0..0..0..1..0..3....0..0..0..0..0..0..0..0....0..0..0..0..0..2..1..1

Crossrefs

Sequence in context: A075010 A214559 A326183 * A096710 A322682 A322692

Adjacent sequences: A184148 A184149 A184150 * A184152 A184153 A184154

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved