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!)
A318546 Number of n X n 0..1 arrays with every element unequal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 3, 5, 64, 842, 14760, 437825, 21556643, 1516492860, 183780175203 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A318552.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5:

  0 0 1 0 0    0 1 0 1 1    0 0 1 0 1    0 1 0 1 0

  1 0 0 0 1    1 1 1 0 0    1 0 0 0 1    0 0 0 0 1

  0 0 0 0 0    0 1 1 0 1    0 0 1 1 1    0 0 1 1 1

  1 1 0 0 0    1 0 0 0 0    0 1 0 1 0    1 0 1 0 1

  1 0 0 1 0    1 0 0 1 0    0 1 1 1 1    0 1 1 1 0

CROSSREFS

Cf. A318552.

Sequence in context: A222644 A181904 A319584 * A076513 A222611 A261071

Adjacent sequences:  A318543 A318544 A318545 * A318547 A318548 A318549

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Aug 28 2018

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)