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A183801 1/4 the number of (n+1)X9 0..3 arrays with no 2X2 subblock having sum 6 0
3924240130, 247844696877249, 15502344363749910194, 971543622805762575749749, 60861648410395945188375656659, 3813006321741956987579568546477519 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A183802

LINKS

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

EXAMPLE

Some solutions for 3X9

..0..0..0..0..0..0..3..3..2....0..0..0..0..0..0..2..0..1

..0..0..0..0..0..0..2..3..2....0..0..0..0..0..0..2..3..1

..0..0..0..0..0..0..3..0..0....0..0..0..0..0..0..0..0..1

CROSSREFS

Sequence in context: A159463 A034615 A022261 * A034647 A234385 A173255

Adjacent sequences:  A183798 A183799 A183800 * A183802 A183803 A183804

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2011

STATUS

approved

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Last modified December 2 23:29 EST 2016. Contains 278694 sequences.