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A209788 Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference 1
30, 3171, 1732554, 4953638163, 73890766377408, 5755153225046584062, 2340066952652845862645106, 4967430727164307775296528613529, 55050195060396467478193037853217885236 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A209796
LINKS
EXAMPLE
Some solutions for n=4
..2..0..2..2..0....0..0..0..1..2....1..0..0..0..0....2..1..0..2..1
..1..0..1..2..1....1..0..2..1..0....1..2..1..0..1....2..2..2..2..0
..2..2..1..2..1....2..2..2..0..0....2..2..0..0..1....1..1..0..0..0
..1..1..1..1..1....2..0..1..0..1....2..1..1..1..1....0..0..0..1..0
..2..1..2..1..0....1..0..1..0..1....2..0..1..2..2....0..1..2..1..1
CROSSREFS
Sequence in context: A352182 A001459 A303007 * A265855 A289395 A338962
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 13 2012
STATUS
approved

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)