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!)
A252566 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7 1
702, 868, 4168, 25882, 498696, 11285381, 155864925, 12185963853, 945844092853, 24332552409889, 8322243636131517, 2215111350571613524, 98531704627753178786, 155638652503561131141300 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252574

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=4

..0..0..2..0..0..1....0..0..2..0..0..2....2..1..3..1..1..3....1..0..0..2..0..0

..2..0..0..2..0..0....3..1..2..3..2..2....2..0..0..2..0..0....0..1..0..0..2..0

..2..3..2..2..3..2....0..2..0..0..2..0....0..2..0..0..2..0....2..2..3..1..2..3

..0..0..2..0..0..1....0..0..2..0..0..1....2..2..3..2..2..3....2..0..0..2..0..0

..1..0..0..2..0..0....3..1..1..3..2..2....1..0..0..1..0..0....0..2..0..0..2..0

..2..3..2..2..3..2....0..2..0..0..2..0....0..1..0..0..1..0....1..2..3..2..1..3

CROSSREFS

Sequence in context: A252567 A252574 A252575 * A269542 A237632 A304155

Adjacent sequences:  A252563 A252564 A252565 * A252567 A252568 A252569

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2014

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 May 17 19:51 EDT 2022. Contains 353778 sequences. (Running on oeis4.)