A210274 Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences

1011912, 958632858, 910532241954, 865403655856588, 822588621201609131, 781910030615896210474, 743245692531829336470460, 706493865582146467787545885, 671559422936656100572786437396

Offset

1,1

Comments

Column 6 of A210276

Links

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

Example

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

Crossrefs

Sequence in context: A043643 A269564 A096931 * A252916 A340435 A066598

Adjacent sequences: A210271 A210272 A210273 * A210275 A210276 A210277

Keyword

nonn

Author

R. H. Hardin Mar 19 2012

Status

approved