login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A263868 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 nondecreasing. 0
2, 2, 7, 7, 61, 379, 62904, 16701495 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A263873.

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0

..0..1..1..1..1....0..0..0..1..1....0..0..0..0..0....0..0..0..1..1

..0..1..1..1..1....0..0..0..1..1....0..0..0..0..0....0..0..0..1..1

..0..1..1..1..1....0..1..1..1..1....0..0..0..1..1....0..0..0..1..1

..0..1..1..1..1....0..1..1..1..1....0..0..0..1..1....0..0..0..1..1

CROSSREFS

Cf. A263873.

Sequence in context: A117779 A300952 A195326 * A263793 A232647 A091665

Adjacent sequences:  A263865 A263866 A263867 * A263869 A263870 A263871

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 28 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 14 23:38 EDT 2022. Contains 356122 sequences. (Running on oeis4.)