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 A304127 Number of n X n 0..1 arrays with every element unequal to 0, 1, 3 or 6 king-move adjacent elements, with upper left element zero. 0
 1, 5, 9, 44, 176, 651, 2945, 14708, 79188, 495071, 3628565, 29134749, 265855219, 2732640025, 30998016185, 398665350465 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A304133. LINKS EXAMPLE Some solutions for n=5 ..0..1..1..1..0. .0..1..1..0..0. .0..0..0..0..0. .0..1..1..1..0 ..1..1..1..1..1. .1..1..1..1..0. .0..0..0..0..1. .1..1..1..1..1 ..1..1..1..0..0. .1..1..1..1..1. .0..0..0..1..1. .1..1..1..1..1 ..1..1..1..1..0. .0..1..1..1..1. .0..0..0..0..0. .0..1..1..1..1 ..1..1..1..1..1. .0..0..1..1..0. .1..0..0..0..1. .0..0..1..1..0 CROSSREFS Cf. A304133. Sequence in context: A123822 A226065 A321718 * A220518 A145031 A121724 Adjacent sequences: A304124 A304125 A304126 * A304128 A304129 A304130 KEYWORD nonn AUTHOR R. H. Hardin, May 07 2018 STATUS approved

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Last modified February 5 17:56 EST 2023. Contains 360086 sequences. (Running on oeis4.)