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!)
A302315 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
64, 86, 336, 1090, 3915, 18990, 76642, 360898, 1695748, 9408402, 50431855, 270054791, 1483688723, 8638547369, 49555516908, 278416318505, 1587868618303, 9269491523649, 53654294707162, 306415770314870, 1762671922872075 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A302309.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..1..1..1..0. .0..1..0..1..0. .0..1..0..0..1. .0..1..0..1..0

..0..1..0..1..0. .1..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0

..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0

..0..1..0..1..0. .0..1..0..1..1. .0..1..0..1..0. .1..1..0..1..0

..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0

..0..1..0..1..1. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0

..1..0..0..1..0. .0..1..0..0..0. .0..1..0..0..1. .0..0..0..1..0

CROSSREFS

Cf. A302309.

Sequence in context: A302640 A302432 A303202 * A303045 A302882 A303530

Adjacent sequences:  A302312 A302313 A302314 * A302316 A302317 A302318

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 05 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 24 02:32 EDT 2022. Contains 353994 sequences. (Running on oeis4.)