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 A183451 Number of n X n binary arrays with every 1 having exactly three king-move neighbors equal to 1. 0
 1, 2, 5, 10, 60, 439, 2906, 36995, 739752, 16870217, 577680500, 39980454239, 4671945102210 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A183456. LINKS Table of n, a(n) for n=1..13. EXAMPLE Some solutions for 5X5 ..1..1..0..1..1....0..0..0..0..0....1..1..0..0..0....0..0..0..1..1 ..1..1..0..1..1....1..1..0..0..0....1..1..0..1..1....0..0..0..1..1 ..0..0..0..0..0....1..1..0..0..0....0..0..0..1..1....0..0..0..0..0 ..0..1..1..0..0....0..0..0..1..1....0..0..0..0..0....0..1..1..0..0 ..0..1..1..0..0....0..0..0..1..1....0..0..0..0..0....0..1..1..0..0 CROSSREFS Sequence in context: A018503 A018535 A140304 * A018549 A053356 A018584 Adjacent sequences: A183448 A183449 A183450 * A183452 A183453 A183454 KEYWORD nonn AUTHOR R. H. Hardin, Jan 05 2011 STATUS approved

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Last modified September 27 19:23 EDT 2023. Contains 365714 sequences. (Running on oeis4.)