A210156 T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having one, three or four distinct clockwise edge differences

57, 820, 820, 11783, 42689, 11783, 169343, 2219034, 2219034, 169343, 2433709, 115368738, 417014920, 115368738, 2433709, 34976109, 5997955680, 78387305947, 78387305947, 5997955680, 34976109, 502659771, 311831135649, 14734218092801

Offset

1,1

Comments

Table starts

.........57.............820................11783.....................169343

........820...........42689..............2219034..................115368738

......11783.........2219034............417014920................78387305947

.....169343.......115368738..........78387305947.............53276322556234

....2433709......5997955680.......14734218092801..........36208249913281496

...34976109....311831135649.....2769555432882273.......24608360596681275093

..502659771..16211961522199...520586406508252346....16724671741551847807857

.7223984325.842852674077118.97853330660544192224.11366651677032505181918785

Links

R. H. Hardin, Table of n, a(n) for n = 1..180

Example

Some solutions for n=4 k=3
..0..0..1..0....1..0..0..0....1..1..1..3....2..0..3..0....3..2..0..1
..0..1..1..3....0..3..1..2....3..3..2..0....2..0..3..1....0..3..3..1
..3..0..3..2....1..0..1..3....0..2..2..1....1..2..0..2....3..2..2..1
..1..3..2..2....1..3..3..2....3..1..0..0....0..2..0..3....1..2..2..0
..1..1..0..3....1..3..0..2....1..0..2..3....2..2..1..3....1..3..1..3

Crossrefs

Sequence in context: A060891 A241967 A098995 * A210149 A254783 A233370

Adjacent sequences: A210153 A210154 A210155 * A210157 A210158 A210159

Keyword

nonn,tabl

Author

R. H. Hardin Mar 18 2012

Status

approved