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 A183812 1/81 the number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0
 1, 162, 163208, 1042063656, 41531687999736, 10425296660739253420 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A183819 LINKS EXAMPLE Some solutions with upper left block zero for 3X3 ..0..0..2....0..0..0....0..0..2....0..0..0....0..0..2....0..0..0....0..0..0 ..0..0..0....0..0..1....0..0..1....0..0..2....0..0..2....0..0..1....0..0..1 ..2..2..0....0..1..2....1..1..1....1..1..1....1..2..1....2..0..1....1..2..1 CROSSREFS Sequence in context: A291131 A209965 A230837 * A036914 A325063 A214185 Adjacent sequences:  A183809 A183810 A183811 * A183813 A183814 A183815 KEYWORD nonn AUTHOR R. H. Hardin Jan 07 2011 STATUS approved

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Last modified June 17 14:09 EDT 2019. Contains 324185 sequences. (Running on oeis4.)