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!)
A252597 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5 0

%I

%S 303,1151,7769,81441,1547711,49281939,2541062469,205891508707,

%T 25990396753815,5072924616525133

%N Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5

%C Diagonal of A252605

%e Some solutions for n=4

%e ..2..1..0..2..2..2....2..2..2..0..2..2....1..2..1..1..1..2....2..1..0..2..1..1

%e ..2..2..0..2..2..0....0..2..2..2..2..2....2..1..1..1..1..1....0..2..1..0..2..1

%e ..2..1..0..2..2..2....2..2..2..2..0..2....1..1..2..1..1..1....1..0..2..1..0..2

%e ..2..1..0..2..2..2....2..0..2..2..2..2....1..1..1..1..1..2....2..2..0..2..1..0

%e ..2..1..0..2..2..0....2..2..2..2..2..2....1..1..1..1..1..1....0..2..1..0..2..2

%e ..2..2..0..2..2..2....2..2..0..2..2..2....1..1..2..1..1..1....2..0..2..1..0..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 19 2014

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 June 16 04:56 EDT 2021. Contains 345056 sequences. (Running on oeis4.)