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!)
A202132 Number of zero-sum nX3 -3..3 arrays with every element equal to at least one horizontal or vertical neighbor 0
1, 123, 1857, 135315, 3767643, 227460779, 8550543057, 461409633685, 19953260512267, 1020672385339045, 47169124107393747, 2357295503312609943, 112529204189556106109, 5573350513364442367517, 270509318554502643186297 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A202134

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=3

..0..0..1....3..3..3....2..2.-3....3..3.-1...-2..2..2....2.-2.-2....1..1.-3

..0..1..1....0.-3.-3...-3..2.-3....0..0.-1...-2.-2..2....2..2..2....0..0.-3

.-2.-2..1....0..0.-3...-3..3..3....0.-2.-2...-2..1..1....2.-3.-3....0..2..2

CROSSREFS

Sequence in context: A324627 A259907 A115983 * A167231 A160040 A297524

Adjacent sequences:  A202129 A202130 A202131 * A202133 A202134 A202135

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 11 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 16 17:58 EST 2022. Contains 350376 sequences. (Running on oeis4.)