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!)
A188567 T(n,k)=Number of nXk binary arrays without the pattern 1 1 1 diagonally, vertically or horizontally 8
2, 4, 4, 7, 16, 7, 13, 49, 49, 13, 24, 169, 247, 169, 24, 44, 576, 1383, 1383, 576, 44, 81, 1936, 7722, 13306, 7722, 1936, 81, 149, 6561, 42712, 127951, 127951, 42712, 6561, 149, 274, 22201, 237116, 1204078, 2109386, 1204078, 237116, 22201, 274, 504, 75076 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

...2......4........7.........13............24..............44

...4.....16.......49........169...........576............1936

...7.....49......247.......1383..........7722...........42712

..13....169.....1383......13306........127951.........1204078

..24....576.....7722.....127951.......2109386........33878337

..44...1936....42712....1204078......33878337.......924245906

..81...6561...237116...11433452.....550371695.....25507294349

.149..22201..1315783..108485757....8927734479....703601341153

.274..75076..7300042.1028265705..144690439154..19385833712450

.504.254016.40505756.9752393774.2346488899945.534376376148754

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..337

EXAMPLE

Some solutions for 5X3

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

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

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

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

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

CROSSREFS

Column 1 is A000073(n+3)

Column 2 is A085697(n+1)

Sequence in context: A207182 A206994 A181224 * A262274 A223669 A223680

Adjacent sequences:  A188564 A188565 A188566 * A188568 A188569 A188570

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Apr 04 2011

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 August 12 21:52 EDT 2022. Contains 356077 sequences. (Running on oeis4.)