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A204152 Number of (n+2)X9 0..2 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order 1
23538722, 169527242, 864266300, 4577683574, 25275772916, 138134688554, 770374556792, 4130467300382, 22550685062612, 121999878097538, 662599450745240, 3588969319485734, 19369358858520164, 104916399180100634 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A204153

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..21

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A104951 A235971 A187551 * A132906 A234342 A104922

Adjacent sequences:  A204149 A204150 A204151 * A204153 A204154 A204155

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 11 2012

STATUS

approved

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Last modified March 20 20:14 EDT 2019. Contains 321352 sequences. (Running on oeis4.)