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A209779 Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference 0
64, 12492, 13606964, 89046135210, 3413352967754696, 774627496109684203370, 1034141529418861531701953000, 8145663030420623706384712975053986 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A209787
LINKS
EXAMPLE
Some solutions for n=4
..0..3..3..3..2....3..0..1..0..0....3..3..0..3..1....0..3..1..3..0
..2..1..1..1..1....3..0..1..1..2....1..3..3..3..1....2..1..1..3..3
..0..3..2..1..2....0..0..0..0..0....1..1..3..2..1....3..3..2..2..1
..3..3..1..1..2....0..3..0..1..1....3..1..1..2..1....3..2..2..1..1
..2..1..1..2..2....2..1..2..2..1....3..2..0..2..0....3..3..1..1..2
CROSSREFS
Sequence in context: A268078 A202548 A364520 * A220300 A316485 A292025
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 13 2012
STATUS
approved

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Last modified July 22 08:35 EDT 2024. Contains 374485 sequences. (Running on oeis4.)