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!)
A222513 Number of 5Xn 0..1 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 8, 87, 497, 2066, 17674, 81537, 800040, 3877847, 39636760, 197167116, 2044535652, 10266459303, 107207411996, 541084890084, 5674279900642, 28738733251005, 302282496834886, 1535249200603440, 16185756541061498 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A222509

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..42

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A241259 A225314 A200767 * A307822 A225613 A243922

Adjacent sequences:  A222510 A222511 A222512 * A222514 A222515 A222516

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 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 September 20 13:56 EDT 2021. Contains 347586 sequences. (Running on oeis4.)