A184152 1/4 the number of (n+1)X9 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically

1119511003, 26652142523719, 608216983453837129, 13967039613166010435737, 320461324635255992201246287, 7353703264467632594839577120701

Offset

1,1

Comments

Column 8 of A184153

Links

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

Example

Some solutions for 3X9 with a(1,1)=0
..0..0..0..0..0..0..2..1..1....0..0..0..0..0..0..0..0..3
..0..0..0..0..0..0..2..1..3....0..0..0..0..0..0..0..0..2
..0..0..0..0..0..3..2..3..3....0..0..0..0..0..3..0..1..1

Crossrefs

Sequence in context: A034650 A035525 A337487 * A296534 A133191 A050290

Adjacent sequences: A184149 A184150 A184151 * A184153 A184154 A184155

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved