The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A282481 T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than three of its king-move neighbors, with the exception of exactly two elements. 7
0, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 18, 40, 18, 0, 0, 89, 483, 483, 89, 0, 0, 408, 4328, 8208, 4328, 408, 0, 0, 1754, 36425, 127603, 127603, 36425, 1754, 0, 0, 7528, 297210, 1905024, 3648818, 1905024, 297210, 7528, 0, 0, 31798, 2327123, 27253740, 97464193 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,8
COMMENTS
Table starts
.0.....0........0..........0.............0...............0..................0
.0.....0........5.........18............89.............408...............1754
.0.....5.......40........483..........4328...........36425.............297210
.0....18......483.......8208........127603.........1905024...........27253740
.0....89.....4328.....127603.......3648818........97464193.........2496089344
.0...408....36425....1905024......97464193......4672345728.......213243466320
.0..1754...297210...27253740....2496089344....213243466320.....17282935743792
.0..7528..2327123..376888612...61848450513...9416926688594...1356909122451366
.0.31798.17768964.5103365490.1496483484838.405614428281622.103825223863665136
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: [order 18]
k=3: [order 27]
k=4: [order 51]
EXAMPLE
Some solutions for n=4 k=4
..0..1..1..1. .1..0..0..1. .0..1..1..0. .1..0..1..0. .1..0..1..1
..1..1..0..0. .1..0..0..1. .0..0..0..1. .0..1..0..0. .1..1..0..0
..1..0..1..1. .1..1..0..0. .1..1..0..0. .0..1..1..1. .0..1..1..0
..1..1..0..0. .1..1..0..0. .1..1..1..0. .0..1..0..1. .1..1..0..0
CROSSREFS
Sequence in context: A285288 A356116 A281165 * A286979 A030047 A176184
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 16 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 16 16:46 EDT 2024. Contains 373432 sequences. (Running on oeis4.)