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A252220
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row and column sum 2 3 or 4 and every diagonal and antidiagonal sum not 2 3 or 4
1
228, 1028, 9566, 58334, 412514, 4329476, 44099648, 415405634, 3886445124, 36834748542, 350195757374, 3322757907650, 31500492289092, 298706072056064, 2833049748399426, 26869277927218244, 254824501845465374
OFFSET
1,1
COMMENTS
Diagonal of A252228
LINKS
EXAMPLE
Some solutions for n=4
..1..1..0..2..0..2....1..1..0..2..0..1....1..1..0..2..0..2....1..1..1..1..1..1
..1..0..2..0..2..1....1..0..2..0..2..0....2..0..2..0..2..0....1..0..2..0..2..0
..0..2..0..2..0..1....0..2..0..2..0..2....0..2..0..2..0..1....0..2..0..2..0..2
..1..0..2..0..2..1....2..0..2..0..2..0....2..0..2..0..2..1....1..0..2..0..2..1
..1..2..0..2..0..2....0..2..0..2..0..1....1..2..0..2..0..2....1..2..0..2..0..1
..1..1..2..0..1..1....1..1..1..0..2..1....1..0..2..0..1..1....2..0..2..0..2..1
CROSSREFS
Sequence in context: A258557 A206005 A228963 * A263301 A053174 A335270
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 15 2014
STATUS
approved