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 A304598 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero. 0
 1, 4, 13, 73, 560, 6007, 75463, 1874284, 62934491, 2085910493, 94776909801, 7409071360844, 887762245576310 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A304604. LINKS EXAMPLE Some solutions for n=5 ..0..0..0..1..0. .0..1..0..0..0. .0..0..0..1..0. .0..0..1..0..0 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1 ..1..1..0..0..1. .1..0..0..0..0. .0..0..0..0..1. .1..0..0..0..0 ..1..1..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..1 ..0..0..0..0..0. .0..0..0..0..0. .0..1..0..1..0. .0..0..1..0..0 CROSSREFS Cf. A304604. Sequence in context: A197969 A121452 A249165 * A171756 A235385 A144055 Adjacent sequences:  A304595 A304596 A304597 * A304599 A304600 A304601 KEYWORD nonn AUTHOR R. H. Hardin, May 15 2018 STATUS approved

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Last modified June 6 15:48 EDT 2020. Contains 334828 sequences. (Running on oeis4.)