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A213412 Half the number of n X n binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I 0
1, 8, 253, 28952, 10142461, 9107867048, 18095156337973 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A213418
LINKS
EXAMPLE
Some solutions for n=4
..1..1..1..1....1..0..1..1....1..0..0..1....1..0..1..1....1..0..0..0
..0..0..0..0....0..0..1..1....1..0..1..0....1..1..0..1....1..0..1..1
..1..1..1..1....1..0..1..0....1..0..1..1....0..1..0..1....0..0..1..1
..0..0..1..0....1..1..0..0....0..0..1..0....0..0..0..1....0..0..0..0
CROSSREFS
Sequence in context: A301401 A162132 A297051 * A226428 A277421 A171612
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified July 23 07:30 EDT 2024. Contains 374545 sequences. (Running on oeis4.)