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!)
A297687 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s. 1
128, 2570, 94891, 1955750, 59210634, 1487819051, 41030621948, 1066508741933, 28748828127508, 759564088991329, 20288126990340123, 538493726660721622, 14345913847238205189, 381379710626740656598, 10150876741291095683850 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 7 of A297682.
LINKS
EXAMPLE
Some solutions for n=3
..1..0..0. .1..0..1. .0..1..1. .1..0..0. .1..0..0. .1..0..0. .1..0..1
..0..1..0. .1..0..1. .0..0..0. .1..0..0. .0..0..1. .1..0..0. .1..0..0
..0..0..0. .0..0..0. .0..0..1. .1..1..1. .1..1..1. .0..0..0. .0..0..0
..0..0..1. .0..0..1. .0..0..1. .0..0..1. .0..0..1. .1..0..0. .0..0..0
..1..0..0. .0..0..0. .0..1..1. .0..0..0. .1..0..0. .1..0..0. .0..0..0
..1..0..1. .0..0..0. .1..0..1. .1..0..1. .0..0..1. .0..0..0. .0..0..1
..0..0..0. .1..0..0. .1..0..0. .1..0..1. .0..0..1. .0..0..1. .0..0..0
CROSSREFS
Cf. A297682.
Sequence in context: A231306 A236209 A283548 * A221662 A250282 A019564
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 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 June 21 04:30 EDT 2024. Contains 373540 sequences. (Running on oeis4.)