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A204505 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally at least two different ways, and new values 0..2 introduced in row major order 0
652, 164248, 161927101, 299144720528, 2274909402099901 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204511

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A204511 A204506 A282558 * A188414 A089673 A104823

Adjacent sequences:  A204502 A204503 A204504 * A204506 A204507 A204508

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2012

STATUS

approved

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Last modified November 18 07:22 EST 2019. Contains 329252 sequences. (Running on oeis4.)