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 A204977 Number of nX7 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..2 introduced in row major order 0
 224, 301056, 41618941, 8202482914, 1519010368414, 284567725886961 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A204978 LINKS Table of n, a(n) for n=1..6. EXAMPLE Some solutions for n=5 ..0..0..1..1..2..0..0....0..0..1..1..2..0..1....0..0..1..0..2..1..1 ..2..1..1..0..1..0..0....1..2..1..2..1..0..1....1..2..1..1..2..1..1 ..2..2..0..1..1..2..1....0..2..0..0..1..2..0....1..0..2..2..0..2..2 ..1..2..0..0..2..2..0....1..0..0..1..2..2..0....2..1..0..0..1..1..0 ..2..0..1..1..2..1..1....1..1..2..0..0..1..2....0..2..2..1..2..2..0 CROSSREFS Sequence in context: A280960 A076007 A280672 * A204704 A206649 A340501 Adjacent sequences: A204974 A204975 A204976 * A204978 A204979 A204980 KEYWORD nonn AUTHOR R. H. Hardin Jan 21 2012 STATUS approved

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Last modified April 22 12:48 EDT 2024. Contains 371900 sequences. (Running on oeis4.)