A187135 Number of (n+1)X5 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces

3249, 182214, 5755698, 201302208, 7020258336, 245891941002, 8616423081600, 301728175130790, 10570455159698376, 370183320491626512, 12967430068901756304, 454182945213312573174, 15908967753084162698652

Offset

1,1

Comments

Column 4 of A187140

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4X5
..0..2..0..0..1....1..2..2..2..0....0..0..1..1..2....1..0..1..0..2
..0..0..0..2..2....1..1..0..0..0....0..1..1..1..0....0..0..1..1..2
..0..0..1..1..0....0..0..0..1..1....0..0..1..1..0....0..0..1..1..2
..0..0..0..1..1....0..0..0..2..1....0..0..1..0..0....0..0..0..2..2

Crossrefs

Sequence in context: A235412 A048421 A238254 * A185840 A251501 A106722

Adjacent sequences: A187132 A187133 A187134 * A187136 A187137 A187138

Keyword

nonn

Author

R. H. Hardin Mar 05 2011

Status

approved