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A187137
Number of (n+1)X7 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
0
72225, 18740754, 1921749372, 245891941002, 29716252404984, 3703181282209854, 456216633873575892, 56423240969024815416
OFFSET
1,1
COMMENTS
Column 6 of A187140
EXAMPLE
Some solutions for 4X7
..1..0..1..2..2..2..0....1..1..2..0..2..2..2....1..0..0..0..1..1..0
..0..0..1..2..1..1..1....0..0..0..0..2..2..1....0..0..1..0..0..2..2
..0..0..0..0..0..1..0....0..0..0..1..1..2..1....0..0..0..0..1..1..1
..0..0..0..1..1..2..0....0..0..0..1..1..1..0....0..0..0..1..2..1..1
CROSSREFS
Sequence in context: A376469 A234330 A333684 * A185842 A251348 A254911
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2011
STATUS
approved