login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A222284 Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order 2
0, 0, 4, 11, 8, 44, 144, 352, 692, 2488, 6476, 17095, 43308, 131488, 340000, 939959, 2520616, 7194232, 19142160, 53471296, 145636612, 407743540, 1107902624, 3092203004, 8488056840, 23644607144, 64986279340, 181063135999, 499746197884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A222290

LINKS

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

EXAMPLE

Some solutions for n=4

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

..0..0....1..0....0..1....0..0....1..1....0..0....1..0....0..1....0..0....0..0

..1..1....0..0....0..0....1..0....1..1....0..0....1..1....1..1....0..1....0..1

..1..1....0..0....0..0....0..0....1..1....1..1....1..1....1..1....1..1....0..0

CROSSREFS

Sequence in context: A205136 A096735 A211458 * A330683 A020949 A210693

Adjacent sequences:  A222281 A222282 A222283 * A222285 A222286 A222287

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 14 2013

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 April 11 23:19 EDT 2021. Contains 342895 sequences. (Running on oeis4.)