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

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

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