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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A266064 Number of nX4 integer arrays with each element equal to the number of horizontal, vertical, diagonal and antidiagonal neighbors exactly one smaller than itself. 1
5, 89, 81, 525, 8262, 25663, 148323, 1480037, 7361668, 43625889, 337487030, 1992491986, 12259297662, 84919942819, 531642104603, 3345439670726, 22164717425170, 141438239886755, 900411960327132, 5860940525461256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A266067.

LINKS

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

EXAMPLE

Some solutions for n=4

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

..1..2..3..2....2..1..1..2....0..1..2..0....2..3..3..1....0..2..0..1

..2..3..0..1....2..1..1..2....2..2..3..0....1..2..3..2....0..2..2..2

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

CROSSREFS

Cf. A266067.

Sequence in context: A221465 A184239 A054954 * A106971 A136618 A138700

Adjacent sequences:  A266061 A266062 A266063 * A266065 A266066 A266067

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 December 1 04:32 EST 2021. Contains 349426 sequences. (Running on oeis4.)