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 A204077 Number of n X n 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1 0
 0, 4, 132, 11236, 13346532, 94591923364, 4337212764978412, 1473512792354952891844 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A204084 LINKS EXAMPLE Some solutions for n=5 ..3..0..0..0..1....3..0..0..0..1....1..1..0..1..2....1..0..2..0..0 ..1..1..1..1..1....1..1..1..1..1....0..2..0..1..0....1..0..1..1..1 ..0..2..1..1..0....0..3..3..0..0....0..0..3..2..0....0..3..3..1..2 ..0..0..0..0..0....0..2..3..1..1....1..1..1..0..1....0..1..0..0..0 ..1..1..3..1..1....1..1..0..0..1....3..0..0..0..1....2..1..0..1..1 CROSSREFS Sequence in context: A204079 A252172 A192837 * A194537 A194538 A194539 Adjacent sequences:  A204074 A204075 A204076 * A204078 A204079 A204080 KEYWORD nonn AUTHOR R. H. Hardin Jan 10 2012 STATUS approved

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Last modified November 20 15:12 EST 2018. Contains 317402 sequences. (Running on oeis4.)