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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 0
1119511003, 26652142523719, 608216983453837129, 13967039613166010435737, 320461324635255992201246287, 7353703264467632594839577120701 (list; graph; refs; listen; history; text; internal format)
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: A261510 A034650 A035525 * A296534 A133191 A050290

Adjacent sequences:  A184149 A184150 A184151 * A184153 A184154 A184155

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2011

STATUS

approved

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Last modified February 20 06:26 EST 2019. Contains 320332 sequences. (Running on oeis4.)