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A209949 Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference 1
852768, 684469520, 547050257224, 437792367422004, 350242477812932534, 280228918282467201434, 224204660538155238268018, 179382625331280966120917002, 143520826707743446496036408692 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A209951
LINKS
EXAMPLE
Some solutions for n=4
..1..2..2..0..0..0..2....1..2..2..0..1..0..2....2..1..1..1..1..2..0
..2..0..0..1..0..1..1....1..2..1..0..0..2..2....1..1..2..1..2..2..1
..2..2..2..1..2..2..2....2..2..1..0..2..2..0....2..1..2..2..2..0..1
..1..2..1..1..1..2..1....2..0..1..1..0..2..2....0..2..2..1..1..2..2
..1..1..1..2..0..2..2....1..2..2..0..2..2..0....1..2..0..1..2..2..1
CROSSREFS
Sequence in context: A216001 A141296 A236978 * A233716 A103913 A151939
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2012
STATUS
approved

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Last modified March 19 02:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)