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!)
A235519 Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 1

%I

%S 2272,61080,1649707,32516127,636820654,9861273365,152479393753,

%T 1957874677935,25165909286162,277510995116690,3067337562969422,

%U 29771961183712488,289825441528124171,2521587145850085310

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

%C Column 2 of A235521

%H R. H. Hardin, <a href="/A235519/b235519.txt">Table of n, a(n) for n = 1..177</a>

%e Some solutions for n=2

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

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

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

%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 May 26 20:43 EDT 2022. Contains 354092 sequences. (Running on oeis4.)