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!)
A251644 Number of (n+2)X(n+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9 1

%I #5 Dec 06 2014 10:42:09

%S 376,908,4522,24706,482506,5167050,63447690,5347152010,106694711818,

%T 2999615701322,1150053080327434,39747272207928330,2598427682764572298,

%U 4665358804935179388426,266654123118022807281674

%N Number of (n+2)X(n+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9

%C Diagonal of A251652

%H R. H. Hardin, <a href="/A251644/b251644.txt">Table of n, a(n) for n = 1..16</a>

%e Some solutions for n=4

%e ..0..0..3..0..3..0....2..3..1..2..3..3....3..1..2..0..1..2....1..1..1..1..1..1

%e ..2..2..2..2..2..2....1..2..0..1..2..3....1..2..0..1..2..0....0..0..3..0..0..3

%e ..1..1..1..1..1..1....0..1..2..3..1..2....2..3..1..2..0..1....2..2..2..2..2..2

%e ..3..3..0..0..3..3....2..3..1..2..3..1....3..1..2..3..1..2....1..1..1..1..1..1

%e ..2..2..2..2..2..2....1..2..3..1..2..0....1..2..3..1..2..3....0..3..0..3..0..0

%e ..1..1..1..1..1..1....3..1..2..0..1..2....2..0..1..2..3..3....2..2..2..2..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 06 2014

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 April 24 06:52 EDT 2024. Contains 371920 sequences. (Running on oeis4.)