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 A265621 Number of 3 X n 0..3*n-1 arrays with upper left zero and lower right 3*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two. 1
 3, 45, 5625, 392320, 13534874, 3413887598, 1130198405370, 53578062122213, 13108218265241141, 992125896408438521, 244355616796007755084, 26142858782722268963104, 5253247467346100142679906 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A265619. LINKS R. H. Hardin, Table of n, a(n) for n = 1..33 EXAMPLE Some solutions for n=3 ..0..1..3....0..2..1....0..4..5....0..2..3....0..4..3....0..4..3....0..8..7 ..2..4..3....2..4..6....6..4..5....3..4..3....0..4..2....2..4..5....8..4..6 ..5..6..8....2..0..8....8..7..8....3..4..8....5..4..8....8..4..8....5..7..8 CROSSREFS Cf. A265619. Sequence in context: A057863 A302156 A229415 * A124488 A086683 A155203 Adjacent sequences: A265618 A265619 A265620 * A265622 A265623 A265624 KEYWORD nonn AUTHOR R. H. Hardin, Dec 10 2015 STATUS approved

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Last modified June 8 03:07 EDT 2023. Contains 363157 sequences. (Running on oeis4.)