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 A318092 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
 0, 5, 45, 1563, 73788, 8985801, 2154127036, 1097965368750, 1190615089872919, 2722471379059198849 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A318098. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=5 ..0..0..0..1..0. .0..1..1..1..0. .0..0..1..0..1. .0..0..0..0..0 ..1..1..0..1..1. .1..1..0..0..0. .1..1..1..0..0. .1..1..1..1..0 ..1..1..1..1..0. .0..0..0..1..0. .1..1..0..0..1. .1..0..1..1..0 ..0..1..1..0..0. .0..0..1..0..0. .0..1..0..1..0. .0..1..0..1..1 ..0..1..1..0..1. .1..0..0..1..1. .0..0..0..0..1. .0..0..1..1..0 CROSSREFS Cf. A318098. Sequence in context: A326650 A323572 A368491 * A050641 A112396 A317861 Adjacent sequences: A318089 A318090 A318091 * A318093 A318094 A318095 KEYWORD nonn AUTHOR R. H. Hardin, Aug 16 2018 STATUS approved

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Last modified February 28 18:11 EST 2024. Contains 370400 sequences. (Running on oeis4.)