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!)
A235520 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 1

%I #4 Jan 11 2014 14:43:09

%S 20164,1693053,136233789,8849747316,569055271070,29822537207178,

%T 1571264979362306,68874735366332203,3041344407262868925,

%U 114330480823095423147,4332358632370420614992,142558641746950286696618

%N Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise

%C Column 3 of A235521

%H R. H. Hardin, <a href="/A235520/b235520.txt">Table of n, a(n) for n = 1..22</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 11 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 25 12:15 EDT 2024. Contains 371969 sequences. (Running on oeis4.)