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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A235240 Number of (n+1)X(n+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant stress tilted 1X1 tilings) 0
210, 3146, 31858, 338282, 2965442, 28726138, 243061138, 2245014658 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A235248

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

..1..6..3..2....1..6..4..7....7..2..7..2....5..3..5..2....4..1..5..2

..5..4..7..0....2..1..5..2....5..6..5..6....0..4..0..3....1..4..2..5

..2..7..4..3....0..5..3..6....0..7..0..7....3..1..3..0....5..2..6..3

..5..4..7..0....3..2..6..3....5..6..5..6....2..6..2..5....2..5..3..6

CROSSREFS

Sequence in context: A024407 A027822 A024449 * A103604 A257711 A061133

Adjacent sequences:  A235237 A235238 A235239 * A235241 A235242 A235243

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

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 June 16 12:38 EDT 2019. Contains 324152 sequences. (Running on oeis4.)