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A187134
Number of (n+1)X4 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
1
405, 19062, 267840, 5755698, 99203418, 1921749372, 34994620836, 658156407930, 12168728064540, 227006548039242, 4215046606416756, 78456814617739176, 1458483057478165140, 27130892560870689198, 504514738674275619150
OFFSET
1,1
COMMENTS
Column 3 of A187140
LINKS
EXAMPLE
Some solutions for 6X4
..0..0..0..0....2..0..0..0....1..0..0..0....1..0..0..0....0..0..0..0
..2..0..0..0....1..0..0..0....1..0..0..0....1..0..0..0....2..0..0..0
..2..0..1..0....2..1..0..0....1..0..0..0....2..0..1..0....2..0..1..0
..0..0..1..0....1..0..0..2....0..0..1..1....2..0..2..2....0..0..1..2
..2..2..2..2....2..1..1..2....0..0..2..2....1..1..2..1....2..2..2..2
..0..1..1..1....1..0..1..1....0..0..2..1....0..2..2..1....1..2..2..1
CROSSREFS
Sequence in context: A224527 A219147 A239541 * A185839 A285924 A285860
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2011
STATUS
approved