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 A265886 Number of n X n 0..2 arrays with the sum of the absolute differences of each element with its horizontal and vertical neighbors equal to the number of neighbors. 1
 3, 12, 68, 664, 13672, 560512, 51483264, 8726974464, 3316077264896, 2260633288966144, 3463290521072435200, 9453965541320232534016, 58047351977461819763589120, 633980080610711649347287646208 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A265887. LINKS R. H. Hardin, Table of n, a(n) for n = 1..18 EXAMPLE Some solutions for n=4 ..2..1..2..2....0..0..1..0....1..2..1..0....1..2..1..2....2..1..0..1 ..1..2..0..0....2..2..0..1....2..1..2..1....0..1..2..1....1..2..1..2 ..2..2..0..1....1..2..0..2....1..2..1..0....1..2..1..0....2..1..2..1 ..0..0..1..2....0..1..0..2....0..1..0..1....2..1..0..1....1..2..1..2 CROSSREFS Cf. A265887. Sequence in context: A058115 A101313 A257605 * A295762 A144008 A244610 Adjacent sequences:  A265883 A265884 A265885 * A265887 A265888 A265889 KEYWORD nonn AUTHOR R. H. Hardin, Dec 17 2015 STATUS approved

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Last modified May 18 11:40 EDT 2022. Contains 353807 sequences. (Running on oeis4.)