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!)
A209787 T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference 9
64, 576, 576, 5074, 12492, 5074, 44948, 266126, 266126, 44948, 397734, 5719838, 13606964, 5719838, 397734, 3520628, 122871278, 706149734, 706149734, 122871278, 3520628, 31161462, 2641341716, 36572974507, 89046135210, 36572974507 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........64...........576.............5074................44948

.......576.........12492...........266126..............5719838

......5074........266126.........13606964............706149734

.....44948.......5719838........706149734..........89046135210

....397734.....122871278......36572974507.......11197401806412

...3520628....2641341716....1896474527890.....1410846309824300

..31161462...56780957220...98317767405921...177700386195973368

.275819644.1220714555712.5097617301286476.22387171143190946674

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..144

EXAMPLE

Some solutions for n=4 k=3

..2..1..2..3....1..3..3..3....1..0..0..1....0..2..2..1....2..0..2..0

..0..1..2..1....1..3..1..3....1..0..1..1....0..0..1..1....1..0..0..0

..0..1..3..1....3..3..1..1....1..1..1..2....1..0..0..0....2..2..2..1

..2..1..3..1....1..3..2..3....1..2..1..0....1..2..0..3....1..3..2..0

..2..1..1..1....1..1..1..1....3..2..0..0....3..0..0..0....3..3..1..1

CROSSREFS

Sequence in context: A247929 A070054 A265636 * A247841 A209780 A330831

Adjacent sequences:  A209784 A209785 A209786 * A209788 A209789 A209790

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 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 August 10 12:58 EDT 2022. Contains 356039 sequences. (Running on oeis4.)