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 A303793 Number of n X n 0..1 arrays with every element unequal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero. 0
 1, 4, 17, 90, 562, 5282, 15478, 394667, 587035, 47608207, 23125171, 8706714125, 1066431672, 2470846969189, 56568350211, 1133933765289063, 3650604967363 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A303800. LINKS EXAMPLE Some solutions for n=5 ..0..1..1..0..0. .0..1..0..1..0. .0..1..0..0..1. .0..1..1..1..1 ..0..1..1..0..0. .1..0..0..0..1. .1..0..0..0..1. .0..1..1..1..1 ..1..1..1..1..0. .0..0..0..0..0. .0..0..0..0..0. .1..1..1..1..1 ..1..1..1..1..0. .1..0..0..0..1. .0..0..0..0..1. .1..1..1..1..1 ..0..0..1..1..1. .1..0..0..1..0. .1..1..0..0..1. .1..1..0..0..1 CROSSREFS Cf. A303800. Sequence in context: A350474 A058279 A143405 * A141154 A347340 A355295 Adjacent sequences: A303790 A303791 A303792 * A303794 A303795 A303796 KEYWORD nonn AUTHOR R. H. Hardin, Apr 30 2018 STATUS approved

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Last modified December 7 12:36 EST 2022. Contains 358656 sequences. (Running on oeis4.)