A197105 Half the number of nX4 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.

61, 13526, 2548972, 478107878, 89735942231, 16851142959473, 3164557733113615, 594285270687803282, 111603060903635664138, 20958362653981821987537, 3935850790928404307414023, 739128413975624217196282524

Offset

1,1

Comments

Column 4 of A197109

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

Some solutions for 5X5
..1..0..0..2....1..0..0..2....1..0..0..2....1..0..0..2....1..0..0..2
..0..0..0..0....0..0..0..0....1..0..0..0....0..0..0..0....0..0..0..0
..0..2..1..0....2..2..1..0....3..0..1..0....0..2..1..0....3..2..1..0
..0..2..0..3....3..1..0..1....1..2..0..0....0..1..1..3....0..3..0..3
..3..1..0..1....2..2..0..1....3..0..0..3....2..2..2..2....2..0..1..1

Crossrefs

Sequence in context: A093261 A062638 A261238 * A387536 A195216 A259412

Adjacent sequences: A197102 A197103 A197104 * A197106 A197107 A197108

Keyword

nonn

Author

R. H. Hardin, Oct 10 2011

Status

approved