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 A318069 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
 1, 6, 18, 73, 316, 3029, 46884, 935951, 38183961, 2877277695, 323244675173, 63938089963412, 22744080515948233, 13243562482553493420 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A318075. LINKS Table of n, a(n) for n=1..14. EXAMPLE Some solutions for n=5 ..0..0..0..0..0. .0..1..1..1..0. .0..1..1..1..0. .0..0..0..0..0 ..0..1..1..0..0. .1..1..1..1..0. .1..1..1..0..0. .0..0..0..0..0 ..0..0..0..1..0. .1..1..1..1..0. .1..1..0..0..1. .0..0..0..0..0 ..0..0..0..1..0. .1..0..1..1..0. .1..0..0..1..1. .0..1..1..0..0 ..0..0..0..0..0. .0..1..1..1..0. .0..0..1..1..1. .0..0..0..0..1 CROSSREFS Cf. A318075. Sequence in context: A129790 A121156 A057051 * A332939 A299412 A218080 Adjacent sequences: A318066 A318067 A318068 * A318070 A318071 A318072 KEYWORD nonn AUTHOR R. H. Hardin, Aug 15 2018 STATUS approved

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Last modified May 29 21:40 EDT 2023. Contains 363042 sequences. (Running on oeis4.)