A210075 1/4 the number of (n+1)X7 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences

2358878, 2593403383, 2759914868891, 3010470408635630, 3283357676806308894, 3585439186083048636774, 3915601347858378096451905, 4276490405746687403204933830, 4670692073071473345284968684057

Offset

1,1

Comments

Column 6 of A210077

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A246226 A204944 A184771 * A187016 A237487 A236484

Adjacent sequences: A210072 A210073 A210074 * A210076 A210077 A210078

Keyword

nonn

Author

R. H. Hardin Mar 17 2012

Status

approved