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 A283408 Number of n X n 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors. 0
 2, 16, 416, 39268, 12806920, 14511646624, 57400505786420, 789746010243688796, 37838366365836075668464, 6312472862913407007488479500, 3666528350801224509187871292147488 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A283415. LINKS Table of n, a(n) for n=1..11. EXAMPLE Some solutions for n=4 ..1..0..0..1. .0..0..1..1. .1..0..1..0. .1..1..0..0. .0..0..0..1 ..1..1..0..0. .1..0..0..0. .0..1..0..1. .0..0..0..1. .1..0..1..0 ..0..1..0..0. .0..1..0..0. .1..0..1..0. .1..1..0..1. .0..0..0..1 ..1..1..1..1. .0..0..0..0. .1..0..0..0. .0..0..0..0. .1..1..1..0 CROSSREFS Cf. A283415. Sequence in context: A283851 A130276 A027871 * A343428 A282309 A009397 Adjacent sequences: A283405 A283406 A283407 * A283409 A283410 A283411 KEYWORD nonn AUTHOR R. H. Hardin, Mar 07 2017 STATUS approved

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Last modified May 29 04:03 EDT 2023. Contains 363029 sequences. (Running on oeis4.)