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!)
A223040 Number of nX5 0..3 arrays with no more than floor(nX5/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 0
34, 17356, 8580619, 7361951209, 3829674402996, 3416064879339302, 1823295483454946374, 1658639508054654478479, 898959521235518459497060, 827155543754315639990554261 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A223041

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A328293 A220870 A281539 * A200461 A287052 A177324

Adjacent sequences:  A223037 A223038 A223039 * A223041 A223042 A223043

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 12 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 November 30 03:47 EST 2021. Contains 349417 sequences. (Running on oeis4.)