The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A233067 Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order 1

%I #6 Dec 18 2015 18:18:47

%S 1,9,582,164495,194998895,975239425635,20656955820980290,

%T 1857471420698911806909,710147877110621514637926027,

%U 1155599363385647621950232861908393

%N Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order

%C Diagonal of A233073

%H R. H. Hardin, <a href="/A233067/b233067.txt">Table of n, a(n) for n = 1..11</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 03 2013

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 June 15 11:51 EDT 2024. Contains 373407 sequences. (Running on oeis4.)