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 A206129 Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases. 0
 256, 6668, 2761756, 5465582068, 51845281856116, 2363085244017636372, 518342328616619031217028, 547728179121316322465056282220 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A206137. LINKS EXAMPLE Some solutions for n=4: ..1..2..3..1..2....0..1..2..1..2....2..1..2..3..0....3..1..3..2..3 ..2..3..1..2..0....1..2..0..2..1....0..2..0..1..2....0..2..0..3..2 ..1..2..3..0..2....0..1..2..1..3....1..3..2..3..0....1..3..1..0..3 ..0..1..2..3..0....2..3..0..2..0....3..2..0..1..2....2..0..2..1..0 ..3..0..1..2..3....1..2..3..1..2....1..3..1..2..1....3..1..3..2..1 CROSSREFS Sequence in context: A056585 A321818 A231307 * A236214 A232959 A187955 Adjacent sequences:  A206126 A206127 A206128 * A206130 A206131 A206132 KEYWORD nonn AUTHOR R. H. Hardin, Feb 04 2012 STATUS approved

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Last modified July 6 14:10 EDT 2022. Contains 355110 sequences. (Running on oeis4.)