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!)
A297400 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 neighboring 1. 1
1, 178, 963, 3924, 74736, 640562, 4279111, 46261441, 428200086, 3465586864, 32328050104, 296748190460, 2574529121380, 23200388627087, 210159449303417, 1865437561436124, 16702908801335717, 150242351184841826 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 7 of A297395.
LINKS
FORMULA
Empirical recurrence of order 69 (see link above)
EXAMPLE
Some solutions for n=5
..1..0..0..1..1. .1..0..0..1..1. .0..1..0..0..0. .1..1..0..1..0
..0..1..0..0..0. .0..1..0..0..0. .0..0..1..0..0. .0..0..0..0..1
..0..0..0..1..1. .0..1..0..1..1. .0..0..1..0..0. .0..1..1..0..0
..1..0..0..0..0. .1..0..0..0..0. .0..1..0..0..0. .0..0..0..0..1
..0..1..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..0
..0..0..0..0..0. .0..0..1..0..0. .0..1..1..0..0. .0..1..0..0..0
..0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..0. .0..0..1..0..0
CROSSREFS
Cf. A297395.
Sequence in context: A217037 A224600 A279093 * A297600 A296824 A297588
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2017
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 June 24 02:53 EDT 2024. Contains 373661 sequences. (Running on oeis4.)