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A184453 1/36 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last 0
12879, 16029, 20706, 28668, 53350, 116832, 309042, 1119528, 4313386, 16945248, 77250850, 344875848, 1476839034, 7104621264, 33006043666, 145119799128, 712190401450, 3363736243872, 14962903947522 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A184457

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

Some solutions with a(1,1)=0 for 4X7

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

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

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

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

CROSSREFS

Sequence in context: A244171 A245793 A251922 * A233936 A158918 A185885

Adjacent sequences:  A184450 A184451 A184452 * A184454 A184455 A184456

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 14 2011

STATUS

approved

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Last modified October 27 21:22 EDT 2020. Contains 338036 sequences. (Running on oeis4.)