A210074 1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences

252951, 107248254, 44179487805, 18568897568014, 7804233177145593, 3283357676806308894, 1381457704957416300604, 581279335475707678444469, 244588824550302004993705045, 102917806810809262696758690674

Offset

1,1

Comments

Column 5 of A210077

Links

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

Example

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

Crossrefs

Sequence in context: A212843 A270267 A255441 * A230484 A236874 A236163

Adjacent sequences: A210071 A210072 A210073 * A210075 A210076 A210077

Keyword

nonn

Author

R. H. Hardin Mar 17 2012

Status

approved