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A263793 Number of (n+1)X(n+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nonincreasing 0
2, 2, 7, 7, 61, 616, 62904, 20141827 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A263799
LINKS
EXAMPLE
Some solutions for n=5
..1..1..1..1..0..0....1..1..1..1..0..0....1..1..1..1..0..0....1..1..1..1..0..0
..1..1..1..1..0..0....1..1..0..0..1..1....1..1..1..1..0..0....1..1..1..1..0..0
..1..1..0..0..1..1....1..0..1..0..1..0....0..0..0..0..1..1....1..1..0..0..0..0
..1..1..0..0..1..1....1..0..0..1..0..0....0..0..0..0..1..1....1..1..0..0..0..0
..0..0..0..0..1..1....0..0..1..0..0..1....0..0..0..0..1..1....1..0..1..0..1..0
..0..0..0..0..1..1....0..0..0..0..0..0....0..0..0..0..1..1....1..0..1..0..1..0
CROSSREFS
Sequence in context: A300952 A195326 A263868 * A232647 A091665 A019905
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 26 2015
STATUS
approved

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Last modified May 21 12:09 EDT 2024. Contains 372736 sequences. (Running on oeis4.)