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 A318208 Number of nXn 0..1 arrays with every element unequal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
 0, 3, 4, 69, 1042, 28010, 1122773, 93034400, 12949799902, 3077725091253 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A318214. LINKS EXAMPLE Some solutions for n=5 ..0..1..0..0..1. .0..1..1..0..0. .0..0..0..1..1. .0..1..1..1..1 ..1..1..0..1..1. .1..1..0..0..1. .1..1..0..1..0. .1..0..0..1..0 ..0..0..0..0..1. .1..0..0..1..1. .1..0..1..1..1. .1..1..1..1..1 ..0..1..0..1..1. .0..0..0..0..0. .0..1..1..1..1. .1..1..1..1..1 ..1..1..1..1..0. .0..1..0..0..1. .0..0..0..0..0. .0..0..0..0..0 CROSSREFS Cf. A318214. Sequence in context: A356292 A012087 A012194 * A341851 A132414 A041171 Adjacent sequences: A318205 A318206 A318207 * A318209 A318210 A318211 KEYWORD nonn AUTHOR R. H. Hardin, Aug 21 2018 STATUS approved

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Last modified January 30 21:42 EST 2023. Contains 359947 sequences. (Running on oeis4.)