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 A303801 Number of nXn 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero. 0
 1, 5, 9, 38, 100, 316, 1217, 8004, 52464, 501170, 4720512, 60221097, 817581575 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A303808. LINKS EXAMPLE Some solutions for n=5 ..0..0..0..1..1. .0..1..1..1..1. .0..0..1..0..1. .0..0..0..0..1 ..0..0..1..1..1. .1..1..1..1..1. .0..0..0..1..1. .0..0..0..0..0 ..0..1..1..1..1. .1..1..1..1..1. .0..0..0..1..1. .0..0..0..0..0 ..1..1..1..1..1. .1..1..1..1..1. .1..0..0..1..1. .0..0..0..0..1 ..1..1..1..1..0. .0..1..1..1..1. .1..1..0..1..0. .1..0..0..1..1 CROSSREFS Cf. A303808. Sequence in context: A200376 A098477 A243762 * A304849 A270622 A270673 Adjacent sequences:  A303798 A303799 A303800 * A303802 A303803 A303804 KEYWORD nonn AUTHOR R. H. Hardin, Apr 30 2018 STATUS approved

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Last modified January 25 19:09 EST 2020. Contains 331249 sequences. (Running on oeis4.)