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!)
A206871 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically 12
2, 4, 4, 7, 16, 7, 13, 49, 49, 12, 24, 169, 211, 144, 21, 44, 576, 1153, 889, 441, 37, 81, 1936, 6139, 7675, 3967, 1369, 65, 149, 6561, 31529, 63866, 55063, 17737, 4225, 114, 274, 22201, 165783, 502864, 728935, 397221, 78799, 12996, 200, 504, 75076, 867545 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

...2.....4......7.......13.........24..........44............81.............149

...4....16.....49......169........576........1936..........6561...........22201

...7....49....211.....1153.......6139.......31529........165783..........867545

..12...144....889.....7675......63866......502864.......4108471........33311703

..21...441...3967....55063.....728935.....8942469.....115505069......1476136671

..37..1369..17737...397221....8373905...159327093....3254925997.....65503023421

..65..4225..78799..2841311...95207761..2805723059...90497940567...2863087460903

.114.12996.350017.20294131.1080443638.49382253588.2513905109615.125050630010443

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..312

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

CROSSREFS

Column 1 is A005251(n+3)

Column 2 is A188501

Row 1 is A000073(n+3)

Row 2 is A085697(n+1)

Sequence in context: A206889 A188774 A206936 * A207088 A207182 A206994

Adjacent sequences:  A206868 A206869 A206870 * A206872 A206873 A206874

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 13 2012

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 23 23:07 EDT 2022. Contains 353993 sequences. (Running on oeis4.)