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!)
A318420 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
1, 5, 5, 71, 129, 280, 839, 2717, 8803, 25414, 74518, 227494, 702137, 2143691, 6482983, 19639879, 59787428, 182279554, 554882961, 1687253474, 5131113671, 15614188211, 47523441803, 144618256222, 440018989420, 1338830460614 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 5 of A318423.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..0..0..1..0. .0..1..0..1..1. .0..0..1..0..0
..1..0..1..1..1. .0..0..1..1..0. .1..0..0..1..1. .0..1..1..0..0
..1..1..0..1..0. .0..1..1..1..1. .0..1..0..1..1. .1..0..1..1..1
..0..1..1..0..0. .1..1..1..0..1. .0..0..0..0..0. .1..1..1..0..1
..0..1..0..0..0. .0..0..1..1..0. .1..1..1..0..1. .0..0..1..1..0
CROSSREFS
Cf. A318423.
Sequence in context: A241209 A171726 A129358 * A151492 A081050 A081049
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 26 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 March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)