A185930 Number of (n+1)X7 0..3 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace

106519232, 304295071104, 901434253841216, 2660771010874885728, 7860583219546798541024, 23221991267256751327588320, 68603053673782945157839799264, 202669623828919364821359439182528

Offset

1,1

Comments

Column 6 of A185933

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

Some solutions for 3X7
..2..0..2..0..0..2..0....2..0..2..2..1..3..0....2..0..2..3..0..1..0
..0..0..0..0..3..0..1....0..0..0..0..2..1..2....0..0..0..0..3..1..1
..0..0..2..0..1..2..0....0..0..2..0..3..3..1....0..0..2..0..2..1..2

Crossrefs

Sequence in context: A035498 A018897 A124149 * A184572 A184783 A204953

Adjacent sequences: A185927 A185928 A185929 * A185931 A185932 A185933

Keyword

nonn

Author

R. H. Hardin Feb 06 2011

Status

approved