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A204069
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order
0
8, 329, 45056, 19934369, 28864215128, 137884925726873, 2183735443548857744, 115025778364437876962225, 20195410108776255562409533352, 11837286998861556208797264551862761
OFFSET
1,1
COMMENTS
Diagonal of A204076
EXAMPLE
Some solutions for n=4
..0..1..1..1..2....0..0..0..0..1....0..1..0..2..2....0..0..0..0..1
..1..2..1..2..0....1..0..0..1..2....0..0..2..1..2....0..2..0..1..2
..1..1..2..2..2....1..1..0..0..1....1..0..0..2..0....0..0..0..0..1
..1..2..2..1..2....0..1..1..0..0....2..1..0..0..2....1..0..2..0..0
..0..1..2..2..1....1..0..1..1..0....2..2..1..0..0....1..1..0..2..0
CROSSREFS
Sequence in context: A264053 A300613 A221407 * A226551 A374307 A285370
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 10 2012
STATUS
approved