login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A252211 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 5 6 or 7 0
874, 1078, 3303, 44776, 984604, 34351865, 1834743852, 150852965441, 19211276199350, 3761840357784412, 1133324153448762150, 526775964680392302044 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252219

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

..3..3..3..3..3..3....3..3..3..3..3..3....1..1..1..1..1..1....1..1..1..1..1..1

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

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

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

CROSSREFS

Sequence in context: A251085 A334011 A206312 * A045258 A252219 A252212

Adjacent sequences:  A252208 A252209 A252210 * A252212 A252213 A252214

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 18 07:38 EDT 2021. Contains 347511 sequences. (Running on oeis4.)