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 A205652 Number of (n+1)X(n+1) 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors. 0
 256, 12296, 511632, 41013960, 7578064080, 2994560119488, 2904705131186012 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A205659. LINKS Table of n, a(n) for n=1..7. EXAMPLE Some solutions for n=4: ..0..2..2..2..0....1..1..2..2..3....0..0..2..0..1....2..3..3..3..0 ..0..1..2..3..3....3..2..1..0..3....2..0..2..0..1....3..2..1..0..1 ..0..2..0..1..0....1..2..1..2..3....3..2..3..1..3....3..2..3..0..1 ..2..1..0..2..1....1..0..3..2..0....3..2..3..1..3....1..0..3..1..0 ..2..2..0..1..1....2..0..0..2..3....0..3..0..2..0....1..1..3..0..0 CROSSREFS Sequence in context: A205936 A264496 A224967 * A284032 A205089 A239443 Adjacent sequences: A205649 A205650 A205651 * A205653 A205654 A205655 KEYWORD nonn AUTHOR R. H. Hardin, Jan 30 2012 STATUS approved

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Last modified December 6 20:17 EST 2023. Contains 367614 sequences. (Running on oeis4.)