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A186921
Number of (n+1)X8 0..3 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
0
10419200, 30161413056, 28533024476512, 37393297725524928, 43448233709038001344
OFFSET
1,1
COMMENTS
Column 7 of A186923
EXAMPLE
Some solutions for 3X8
..0..1..1..3..0..1..3..2....0..1..1..3..1..3..3..2....0..1..1..0..1..3..2..3
..0..0..0..0..0..3..3..1....0..0..0..0..1..3..3..3....0..0..0..0..3..2..2..3
..0..0..0..0..0..3..1..1....0..0..0..0..0..3..3..3....0..0..0..0..0..0..3..3
CROSSREFS
Sequence in context: A159837 A241791 A234198 * A185805 A306476 A251640
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2011
STATUS
approved