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A204622
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order
1
12, 2049, 2490558, 21550390395, 1327448018292252, 582081449451902347866, 1816995451072561641887723586, 40376415985445663379679403072064855, 6387126785648912581213165822171077074078454
OFFSET
1,1
COMMENTS
Diagonal of A204630
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..1..1..0
..1..0..1..0....1..1..0..2....0..1..2..0....1..1..0..1....1..2..1..2
..2..1..1..0....2..0..2..1....1..2..2..0....2..2..1..1....0..1..0..1
..2..0..0..0....1..2..1..0....0..1..1..2....1..1..0..0....2..0..0..1
CROSSREFS
Sequence in context: A263584 A323816 A208252 * A369336 A004823 A342964
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2012
STATUS
approved