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 A208871 Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors 1
 715, 4578580, 32271626438, 228847686794351, 1624001903270517563, 11525604443642285224422, 81798476241280856702695038, 580533377647449287012352167379, 4120113916814898485216382089787455 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A208872 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..0..0..0..0..0..0....0..1..1..2..0..1..0....0..0..0..0..1..2..1 ..1..2..1..1..1..1..1....0..0..0..3..0..1..1....1..1..1..2..1..3..3 ..1..0..3..2..2..2..3....2..1..2..2..1..0..3....2..2..0..2..2..1..2 ..3..0..3..3..3..0..1....2..3..0..2..3..0..0....0..1..1..0..2..3..0 CROSSREFS Sequence in context: A208352 A223061 A208863 * A208878 A208174 A200800 Adjacent sequences: A208868 A208869 A208870 * A208872 A208873 A208874 KEYWORD nonn AUTHOR R. H. Hardin Mar 02 2012 STATUS approved

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Last modified March 23 23:09 EDT 2023. Contains 361454 sequences. (Running on oeis4.)