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!)
A266080 Number of nX7 integer arrays with each element equal to the number of horizontal and vertical neighbors differing from itself by exactly one. 1
1, 1, 10, 23, 55, 146, 466, 1155, 3364, 9229, 25566, 70308, 196647, 544696, 1527557, 4229863, 11872589, 32954820, 92269343, 256481433, 718070373, 1997666638, 5589444252, 15558565416, 43515994717, 121194482007, 338915914513 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 7 of A266081.

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..2..3..2

..2..3..2..2..3..2..0....0..0..2..3..2..0..0....0..0..0..0..3..4..3

..3..4..3..3..4..3..0....0..0..3..4..3..0..0....0..0..0..0..2..3..2

..2..3..2..2..3..2..0....0..0..2..3..2..0..0....0..0..0..0..0..0..0

CROSSREFS

Cf. A266081.

Sequence in context: A072245 A135277 A156202 * A316093 A262485 A219940

Adjacent sequences:  A266077 A266078 A266079 * A266081 A266082 A266083

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

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 July 29 17:41 EDT 2021. Contains 346346 sequences. (Running on oeis4.)