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A204288 Number of (n+2)X6 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..3 introduced in row major order 0
1429921, 69321821, 3531083953, 103672509054, 5112434552746, 246289063621747, 8867170877747911, 413064418681389891 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A204289

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A186837 A054852 A242824 * A321040 A234657 A015361

Adjacent sequences:  A204285 A204286 A204287 * A204289 A204290 A204291

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 13 2012

STATUS

approved

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Last modified January 26 19:45 EST 2021. Contains 340442 sequences. (Running on oeis4.)