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 A183817 1/81 the number of (n+1)X7 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0
 32768, 26630220, 20864057480, 16607782066704, 13143529051807800, 10425296660739253420 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A183819 LINKS EXAMPLE Some solutions with upper left block zero for 3X7 ..0..0..0..0..0..2..1....0..0..0..0..2..0..1....0..0..0..0..2..2..0 ..0..0..2..2..1..1..1....0..0..1..1..0..0..1....0..0..2..2..2..2..1 ..1..0..1..0..2..1..0....2..0..2..0..1..1..0....1..0..2..0..1..1..0 CROSSREFS Sequence in context: A017694 A010803 A236223 * A303267 A323545 A017693 Adjacent sequences:  A183814 A183815 A183816 * A183818 A183819 A183820 KEYWORD nonn AUTHOR R. H. Hardin Jan 07 2011 STATUS approved

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Last modified March 28 18:55 EDT 2020. Contains 333103 sequences. (Running on oeis4.)