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A255019 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1 1
26, 134, 1489, 21854, 480456, 16789556, 896763036, 73759241667, 9393184984367, 1838801806417472, 553960321837762309, 257519518174289401196, 184540608154581393175412, 203698879433082432079178111 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A255027
LINKS
EXAMPLE
Some solutions for n=4
..1..1..1..1..0..1....1..0..1..1..1..1....1..1..1..0..1..1....1..0..1..1..1..0
..1..0..1..1..1..0....1..1..1..1..0..1....1..1..1..1..1..0....1..1..1..1..1..1
..1..1..1..0..1..1....1..1..0..1..1..1....0..1..1..1..1..1....1..1..1..1..1..1
..1..1..1..1..1..1....1..1..1..1..1..0....1..1..0..1..1..1....1..1..1..1..1..0
..1..1..1..1..0..1....1..1..1..1..1..1....1..1..1..1..1..1....0..1..1..1..1..1
..1..1..1..1..1..1....1..1..1..1..0..1....1..0..1..1..1..0....1..1..1..1..1..1
CROSSREFS
Sequence in context: A042318 A264287 A166801 * A223418 A331458 A238917
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 13 2015
STATUS
approved

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Last modified April 14 23:31 EDT 2024. Contains 371667 sequences. (Running on oeis4.)