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 A265175 Number of nX3 0..n*3-1 arrays with upper left zero and lower right n*3-1 and each element differing from its horizontal and vertical neighbors by a power of two. 1
 1, 21, 2024, 170970, 7796840, 1346956387, 226158945148, 16064538255326, 2727481849960472, 241831690436276658, 46326258129266431511, 5463137744818812207086, 939106595874317262360608 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 3 of A265178. LINKS R. H. Hardin, Table of n, a(n) for n = 1..194 EXAMPLE Some solutions for n=4 ..0..2..3....0..1..0....0..4..3....0..8..6....0..2..6....0..4..5....0..1..2 ..2..3..7....1..3..1....8..6..5....8..6..2....2..3..5....8..6..4....4..5..1 ..4..5..9....3.11..3....9..5..7....4..8.10....6..7..3....9..7..3....3..7..3 ..2..3.11....2..3.11....8..7.11....5..9.11....7..3.11....8..9.11....2..3.11 CROSSREFS Cf. A265178. Sequence in context: A358803 A243685 A221122 * A300577 A304643 A153848 Adjacent sequences: A265172 A265173 A265174 * A265176 A265177 A265178 KEYWORD nonn AUTHOR R. H. Hardin, Dec 03 2015 STATUS approved

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Last modified February 26 07:39 EST 2024. Contains 370335 sequences. (Running on oeis4.)