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 A186953 1/729 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace 0
 0, 3783, 5903759, 47796308777, 1557834542977401, 226578401020498502579 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A186962 LINKS EXAMPLE Some solutions for 4X4 ..0..0..0..0....1..0..0..0....1..0..0..0....2..0..0..0....1..0..0..0 ..2..2..1..1....0..1..1..2....2..0..1..1....1..0..1..0....0..2..2..1 ..0..0..0..1....0..1..1..2....2..2..2..2....1..1..0..0....2..2..0..2 ..2..0..0..0....2..0..2..1....2..2..0..2....1..1..0..1....2..0..1..2 CROSSREFS Sequence in context: A080953 A178193 A135200 * A107539 A046837 A109183 Adjacent sequences:  A186950 A186951 A186952 * A186954 A186955 A186956 KEYWORD nonn AUTHOR R. H. Hardin Mar 01 2011 STATUS approved

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