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 A265617 Number of nX4 0..n*4-1 arrays with upper left zero and lower right n*4-1 and each element differing from its horizontal and diagonal neighbors by a power of two. 1
 2, 908, 392320, 36820624, 283374980138, 281538588667512, 353827263949405920, 425853730907471177448, 889897682364060288415454, 1489134329684078361665704606, 2987652891220714880029028729466 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A265619. LINKS R. H. Hardin, Table of n, a(n) for n = 1..24 EXAMPLE Some solutions for n=2 ..0..4..3..1....0..2..6..2....0..4..6..2....0..4..3..4....0..1..3..1 ..6..4..6..7....3..1..3..7....0..2..3..7....3..2..3..7....3..1..3..7 CROSSREFS Cf. A265619. Sequence in context: A261528 A265881 A203609 * A324597 A159723 A282346 Adjacent sequences: A265614 A265615 A265616 * A265618 A265619 A265620 KEYWORD nonn AUTHOR R. H. Hardin, Dec 10 2015 STATUS approved

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Last modified August 10 08:52 EDT 2024. Contains 375044 sequences. (Running on oeis4.)