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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

Table of n, a(n) for n=1..8.

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

Cf. A263799

Sequence in context: A300952 A195326 A263868 * A232647 A091665 A019905

Adjacent sequences:  A263790 A263791 A263792 * A263794 A263795 A263796

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 26 2015

STATUS

approved

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Last modified May 28 07:30 EDT 2022. Contains 354112 sequences. (Running on oeis4.)