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!)
A252138 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7 2
3905, 24031, 213689, 1741344, 14105069, 115183261, 937980660, 7634089505, 62282795715, 507708323758, 4135550418633, 33696297343197, 274629581667408, 2238121992115213, 18238035152919716, 148617809035821872 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A252139

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

..3..3..2..3..3..3..3..3..3....3..3..3..3..3..3..3..3..2

..2..3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..3..3

..3..3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..3..3

..3..3..3..2..3..3..3..3..2....2..3..3..2..3..3..2..3..3

CROSSREFS

Sequence in context: A242873 A135202 A204147 * A115468 A066386 A326385

Adjacent sequences:  A252135 A252136 A252137 * A252139 A252140 A252141

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 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 April 18 13:44 EDT 2021. Contains 343088 sequences. (Running on oeis4.)