A187136 Number of (n+1)X6 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces

12609, 1853892, 99203418, 7020258336, 440941355208, 29716252404984, 1928394629936928, 127632346709629266, 8355847987373669514, 550355304750006790962, 36131509292425042328892, 2376245166849996273772092

Offset

1,1

Comments

Column 5 of A187140

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

Some solutions for 4X6
..1..0..0..1..2..1....0..0..0..1..2..0....1..1..0..2..1..2....0..0..1..1..0..2
..0..0..1..1..2..1....0..0..1..2..1..0....0..0..0..0..1..2....0..0..1..2..1..2
..0..0..0..0..2..2....0..0..1..1..1..2....0..0..1..0..0..2....0..0..1..2..1..2
..0..0..0..1..1..2....0..0..0..0..0..2....0..0..0..0..1..1....0..0..0..1..0..1

Crossrefs

Sequence in context: A248709 A352586 A261860 * A185841 A219332 A254262

Adjacent sequences: A187133 A187134 A187135 * A187137 A187138 A187139

Keyword

nonn

Author

R. H. Hardin Mar 05 2011

Status

approved