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!)
A252149 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7 0

%I

%S 1254,1874,3197,8425,29276,112547,446661,1835764,7371828,29451572,

%T 157491348,667705844,2844547668,89546455828,470179496916,2340994229396

%N Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7

%C Diagonal of A252157

%e Some solutions for n=4

%e ..3..0..2..3..3..3....3..3..3..2..3..3....3..3..3..3..2..3....3..3..2..0..2..3

%e ..3..2..0..2..0..2....2..0..2..0..2..0....3..2..0..2..0..2....3..2..0..2..0..3

%e ..3..0..2..0..2..0....0..2..0..2..0..2....2..0..2..0..2..0....2..0..2..0..2..3

%e ..3..2..0..2..0..2....2..0..2..0..2..3....3..2..0..2..0..2....0..2..0..2..0..2

%e ..2..0..2..0..2..0....0..2..0..2..0..3....3..0..2..0..2..3....2..0..2..0..2..3

%e ..0..2..0..2..0..3....2..0..2..3..3..3....3..2..3..3..3..3....0..2..3..3..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 14 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 January 23 03:15 EST 2022. Contains 350504 sequences. (Running on oeis4.)