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 A284764 Number of n X n 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1. 0
 0, 4, 119, 10120, 4219759, 7032604532, 48994677634459, 1392340919671593156 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A284771. LINKS Table of n, a(n) for n=1..8. EXAMPLE Some solutions for n=4 ..1..0..0..0. .0..0..1..1. .1..0..1..0. .1..0..1..0. .0..0..0..1 ..1..1..1..0. .1..0..1..1. .1..0..1..1. .1..1..0..0. .0..0..0..0 ..0..0..0..0. .1..0..0..1. .1..0..0..0. .0..1..0..0. .0..0..0..1 ..0..1..1..1. .0..0..1..1. .0..1..0..0. .0..0..1..0. .0..0..1..1 CROSSREFS Cf. A284771. Sequence in context: A285053 A264420 A283035 * A271421 A064204 A054644 Adjacent sequences: A284761 A284762 A284763 * A284765 A284766 A284767 KEYWORD nonn AUTHOR R. H. Hardin, Apr 02 2017 STATUS approved

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Last modified August 14 16:54 EDT 2024. Contains 375166 sequences. (Running on oeis4.)