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A183994
Number of (n+1)X(n+1) 0..2 arrays with all 2X2 subblock sums the same
0
81, 309, 977, 3309, 10449, 35565, 118097, 418461, 1476081, 5460909
OFFSET
1,1
COMMENTS
Diagonal of A184003
EXAMPLE
Some solutions for 3X3
..2..0..2....1..0..2....0..2..0....2..0..2....1..1..1....0..0..0....0..2..0
..0..2..0....2..0..1....2..0..2....2..1..2....2..2..2....1..0..1....2..2..2
..2..0..2....1..0..2....1..1..1....2..0..2....2..0..2....0..0..0....1..1..1
CROSSREFS
Sequence in context: A206678 A237463 A237456 * A237703 A237696 A237557
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2011
STATUS
approved