login
This site is supported by donations to The OEIS Foundation.

 

Logo

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A109618 Half the number of nXnXn triangular binary arrays with the sum of each element's NW E SW neighbors unequal to the sum of its NE W SE neighbors 1
0, 0, 0, 2, 8, 56, 482, 6374, 116980, 3089024, 115321068, 6150672392 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for 6X6X6 with a(1,1)=0

.......0............0............0............0............0............0

......0.1..........1.0..........1.0..........0.1..........1.0..........1.0

.....0.0.1........0.1.1........1.0.1........1.1.0........0.1.1........0.1.1

....0.1.0.0......0.1.1.1......1.1.0.1......1.1.0.1......1.0.1.1......0.1.0.0

...1.1.0.1.1....1.1.0.1.0....0.1.0.0.0....1.0.0.0.1....1.0.0.0.1....0.0.0.1.0

..0.0.1.1.0.0..0.0.1.0.1.0..0.1.0.1.1.0..0.0.1.1.0.0..0.0.1.1.0.0..0.1.1.0.1.1

CROSSREFS

Equal sums gives A023022(n+2)

Sequence in context: A023179 A009298 A113248 * A201128 A277498 A097691

Adjacent sequences:  A109615 A109616 A109617 * A109619 A109620 A109621

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 02 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified August 19 23:35 EDT 2017. Contains 290821 sequences.