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!)
A201984 Number of nX2 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing 1

%I #5 Mar 31 2012 12:36:46

%S 4,77,1170,14107,139471,1177568,8721417,57801225,347923603,1924356711,

%T 9871703167,47329086175,213435856527,910247506472,3688234465315,

%U 14255722610693,52746861442115,187406263165391,641125854338628

%N Number of nX2 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing

%C Column 2 of A201989

%H R. H. Hardin, <a href="/A201984/b201984.txt">Table of n, a(n) for n = 1..177</a>

%e Some solutions for n=5

%e .-3..2...-3.-2...-3..2...-3..2...-3..3...-3.-2...-3.-1...-3.-3...-2.-2...-3..1

%e .-2.-2...-3.-1...-2.-1...-3..2...-1.-2...-3..2...-2..1...-3..3...-2..3...-2..1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 07 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 March 29 09:28 EDT 2024. Contains 371268 sequences. (Running on oeis4.)