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 A265178 T(n,k)=Number of nXk 0..n*k-1 arrays with upper left zero and lower right n*k-1 and each element differing from its horizontal and vertical neighbors by a power of two. 6
 1, 1, 1, 1, 4, 1, 2, 21, 21, 2, 16, 139, 2024, 139, 16, 79, 8463, 170970, 170970, 8463, 79, 456, 219995, 7796840, 36765048, 7796840, 219995, 456, 2194, 6639203, 1346956387, 19256175024, 19256175024, 1346956387, 6639203, 2194, 20801, 149441692 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts ......1..........1..............1................2................16 ......1..........4.............21..............139..............8463 ......1.........21...........2024...........170970...........7796840 ......2........139.........170970.........36765048.......19256175024 .....16.......8463........7796840......19256175024....62221755947285 .....79.....219995.....1346956387....7187180809683.29140746691543180 ....456....6639203...226158945148.2362949716450873 ...2194..149441692.16064538255326 ..20801.6260685646 .142675 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=3 k=4 ..0..2..6..8....0..8.10.11....0..8..0..2....0..8..9.11....0..2..0..2 ..8..0..2.10....4..6..8.10....4..6..2.10....2..6..8.10....4..6..2.10 ..6..8.10.11....0..8.10.11....8..4..3.11....6..7..9.11....6..5..3.11 CROSSREFS Sequence in context: A299067 A299728 A299839 * A159766 A280284 A004161 Adjacent sequences: A265175 A265176 A265177 * A265179 A265180 A265181 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 03 2015 STATUS approved

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Last modified June 18 07:11 EDT 2024. Contains 373469 sequences. (Running on oeis4.)