A197108 Half the number of nX7 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors

2661, 32393085, 319626874708, 3164557733113615, 31390101087203449414

Offset

1,1

Comments

Column 7 of A197109

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 4X4
..1..0..0..0..1..2..3....1..0..0..0..2..3..1....1..0..0..0..3..3..3
..0..0..2..0..0..1..1....0..0..2..0..0..2..1....0..0..2..0..0..0..0
..0..0..1..0..0..2..3....0..0..1..0..0..0..2....0..0..1..0..0..2..0
..1..0..0..0..2..2..0....1..0..0..0..2..0..0....1..0..0..0..1..2..2

Crossrefs

Sequence in context: A217440 A235733 A235514 * A224685 A167191 A002482

Adjacent sequences: A197105 A197106 A197107 * A197109 A197110 A197111

Keyword

nonn

Author

R. H. Hardin Oct 10 2011

Status

approved