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 A210327 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences 0
 39, 11877, 27838382, 517186072378, 75219268772459800, 85910577682285107137239, 769246866811235591580558612197, 54025101820467333958086011203622611205 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A210335 LINKS EXAMPLE Some solutions for n=4 ..0..0..1..1..1....2..1..0..1..2....2..0..0..1..0....3..0..2..0..3 ..3..3..2..2..0....1..0..0..1..3....2..2..0..1..0....0..3..1..3..3 ..0..3..1..1..3....0..0..1..1..1....2..0..0..0..0....1..2..1..2..1 ..1..2..1..2..0....0..3..2..3..3....1..0..1..0..3....1..0..3..2..2 ..2..3..2..1..1....3..3..1..3..1....0..0..0..0..0....1..2..1..1..3 CROSSREFS Sequence in context: A266453 A279116 A266307 * A174765 A115462 A268072 Adjacent sequences:  A210324 A210325 A210326 * A210328 A210329 A210330 KEYWORD nonn AUTHOR R. H. Hardin Mar 20 2012 STATUS approved

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Last modified May 16 09:28 EDT 2021. Contains 343940 sequences. (Running on oeis4.)