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A204781 Number of (n+2)X9 0..2 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..2 introduced in row major order 1
244944162648, 1352264628934656, 6972630432052561776, 36302705908249227882336, 189028841218044281822571840, 983786658795358884417033843750, 5121078716739687209206582420410120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A204782

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..11

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A202725 A132908 A271820 * A288477 A268846 A076254

Adjacent sequences:  A204778 A204779 A204780 * A204782 A204783 A204784

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 19 2012

STATUS

approved

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Last modified September 24 01:27 EDT 2021. Contains 347617 sequences. (Running on oeis4.)