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 A205602 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..3 introduced in row major order 0
 15, 1030, 229445, 146904738, 219511132715, 1046956456530150 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A205609 LINKS EXAMPLE Some solutions for n=4 ..0..0..0..1..0....0..0..1..2..1....0..0..0..0..1....0..0..1..0..0 ..2..2..0..0..0....1..1..1..2..1....1..0..2..0..1....2..3..3..3..1 ..0..1..1..3..1....3..0..3..2..3....0..2..3..1..0....3..3..0..3..1 ..0..0..1..3..1....2..1..2..0..1....3..2..0..1..2....1..2..2..2..2 ..3..2..2..2..2....1..1..2..0..1....0..1..2..3..0....1..1..1..2..0 CROSSREFS Sequence in context: A082158 A064625 A241331 * A233509 A206162 A203409 Adjacent sequences:  A205599 A205600 A205601 * A205603 A205604 A205605 KEYWORD nonn AUTHOR R. H. Hardin Jan 29 2012 STATUS approved

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Last modified April 18 05:11 EDT 2021. Contains 343072 sequences. (Running on oeis4.)