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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A296667 Number of n X n 0..1 arrays with each 1 adjacent to 0, 2 or 3 king-move neighboring 1's. 0 2, 10, 82, 2295, 213800, 40937523, 25499216805, 45685878532152, 202051384124690942, 2538862787057361542172 (list; graph; refs; listen; history; text; internal format) OFFSET 1,1 COMMENTS Diagonal of A296674. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=4 ..1..1..0..0. .1..0..1..1. .0..0..0..0. .0..0..1..0. .1..1..0..0 ..1..0..0..1. .0..0..0..1. .1..0..0..1. .1..0..0..0. .0..1..0..0 ..1..0..0..0. .1..0..0..0. .0..0..0..0. .0..0..1..0. .0..0..0..1 ..1..1..0..1. .0..0..1..0. .0..0..1..0. .1..0..1..1. .0..0..1..1 CROSSREFS Cf. A296674. Sequence in context: A089469 A281547 A111265 * A003093 A006679 A050390 Adjacent sequences: A296664 A296665 A296666 * A296668 A296669 A296670 KEYWORD nonn AUTHOR R. H. Hardin, Dec 18 2017 STATUS approved

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Last modified August 18 07:06 EDT 2024. Contains 375255 sequences. (Running on oeis4.)