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 A303676 Number of n X n 0..1 arrays with every element unequal to 0, 1 or 3 king-move adjacent elements, with upper left element zero. 0
 1, 5, 9, 28, 76, 177, 367, 774, 1684, 3639, 7597, 15617, 32101, 66074, 135096, 274104, 553668, 1116275, 2245277, 4501938, 9000074, 17953486, 35749382, 71056212, 140977366, 279246077, 552333115, 1091040731 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A303682. LINKS EXAMPLE Some solutions for n=5 ..0..0..1..1..0. .0..1..1..0..0. .0..0..0..0..1. .0..0..0..1..1 ..0..1..1..1..1. .1..1..1..1..0. .0..0..0..0..0. .0..0..0..0..1 ..1..1..1..1..1. .1..1..1..1..1. .0..0..0..0..0. .0..0..0..0..0 ..1..1..1..1..1. .1..1..1..1..1. .0..0..0..0..0. .0..0..0..0..0 ..1..1..1..1..0. .0..1..1..1..1. .1..0..0..0..0. .0..0..0..0..0 CROSSREFS Cf. A303682. Sequence in context: A147367 A147230 A192914 * A163779 A280487 A191013 Adjacent sequences: A303673 A303674 A303675 * A303677 A303678 A303679 KEYWORD nonn AUTHOR R. H. Hardin, Apr 28 2018 STATUS approved

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Last modified March 24 23:24 EDT 2023. Contains 361511 sequences. (Running on oeis4.)