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!)
A253160 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically and nw-se diagonally 1
558, 5136, 46752, 443362, 4189216, 39478862, 371551030, 3500351616, 32968666098, 310607972526, 2925948121986, 27562007609152, 259623715582126, 2445694348190100, 23038546105524370, 217021887885861286 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A253164

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

..1..1..1....1..1..2....1..1..0....2..1..2....2..0..1....0..2..0....1..0..2

..1..0..0....0..2..2....2..2..0....1..1..0....1..2..1....0..0..1....1..2..1

..2..1..0....2..1..1....1..2..1....2..2..0....1..0..0....0..1..2....1..1..2

..2..2..0....2..2..0....2..0..1....0..0..0....1..1..1....2..0..2....1..0..1

CROSSREFS

Sequence in context: A071393 A253290 A206123 * A253478 A253483 A185772

Adjacent sequences:  A253157 A253158 A253159 * A253161 A253162 A253163

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 28 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 January 27 10:55 EST 2022. Contains 350607 sequences. (Running on oeis4.)