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 A296637 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1's. 0
 1, 10, 132, 5696, 742601, 263456105, 267838310277, 775597735818257, 6368326825456570489, 148644719322790247465982, 9857838321384193865155602133 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A296643. LINKS EXAMPLE Some solutions for n=4 ..0..0..1..0. .0..0..0..0. .1..0..1..1. .0..1..1..1. .0..0..1..1 ..0..1..0..1. .1..0..0..1. .1..0..0..1. .1..0..0..1. .0..0..0..0 ..0..1..1..0. .1..0..1..0. .0..1..0..0. .0..0..0..0. .1..1..0..0 ..1..1..1..0. .0..0..1..1. .0..1..0..0. .1..1..0..0. .0..1..0..0 CROSSREFS Cf. A296643. Sequence in context: A239814 A166771 A264279 * A223407 A203325 A324421 Adjacent sequences: A296634 A296635 A296636 * A296638 A296639 A296640 KEYWORD nonn AUTHOR R. H. Hardin, Dec 17 2017 STATUS approved

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Last modified March 26 17:26 EDT 2023. Contains 361551 sequences. (Running on oeis4.)