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 A296535 Number of nXn 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1s. 0
 1, 3, 16, 126, 2104, 78660, 5705431, 820373528, 239372827502, 141301759543525, 168080053760638246, 403684916425998696873 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A296541. LINKS EXAMPLE Some solutions for n=6 ..0..1..0..0..0..0. .0..0..0..1..0..0. .0..0..0..1..1..0. .0..1..1..1..1..0 ..1..1..0..1..1..0. .0..1..1..1..0..0. .0..0..1..0..1..0. .1..0..0..0..1..0 ..0..0..1..0..1..0. .0..1..0..0..0..0. .0..1..0..0..1..0. .1..1..1..1..0..0 ..0..1..0..0..1..0. .1..1..0..1..0..0. .0..1..0..0..1..1. .0..0..0..0..0..0 ..1..0..1..1..0..0. .0..0..1..1..0..0. .1..0..0..0..0..1. .0..0..0..0..0..0 ..1..1..0..0..0..0. .0..0..0..0..0..0. .1..1..1..1..1..0. .0..0..0..0..0..0 CROSSREFS Cf. A296541. Sequence in context: A247591 A188805 A214645 * A088358 A082161 A264636 Adjacent sequences:  A296532 A296533 A296534 * A296536 A296537 A296538 KEYWORD nonn AUTHOR R. H. Hardin, Dec 15 2017 STATUS approved

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Last modified January 22 07:39 EST 2020. Contains 331139 sequences. (Running on oeis4.)