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!)
A187675 Number of (n+2)X4 0..3 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum 1

%I

%S 9136352,1292583020,184351404608,26257519475028,3739210796619416,

%T 532523771629995532,75840322054047845954,10800899342885484556064,

%U 1538224290587862925230372,219068281015870859530254112

%N Number of (n+2)X4 0..3 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum

%C Column 2 of A187676

%H R. H. Hardin, <a href="/A187675/b187675.txt">Table of n, a(n) for n = 1..55</a>

%e Some solutions for 6X4

%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 12 2011

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 July 4 20:49 EDT 2022. Contains 355086 sequences. (Running on oeis4.)