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 A218312 Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..2 n X n array 0
 1, 15, 511, 65089, 33296833, 68184176641, 558512367132769, 18299400300282885215 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A218319. LINKS EXAMPLE Some solutions for n=3: ..0..0..1....1..1..0....0..0..0....1..0..1....1..1..1....1..1..1....1..0..0 ..1..1..1....0..1..1....0..1..1....0..1..1....0..0..0....1..0..1....0..1..0 ..0..0..1....0..0..0....0..0..1....1..1..0....0..1..1....1..1..1....1..1..0 CROSSREFS Sequence in context: A218365 A203326 A092561 * A218280 A218632 A218235 Adjacent sequences:  A218309 A218310 A218311 * A218313 A218314 A218315 KEYWORD nonn AUTHOR R. H. Hardin, Oct 25 2012 STATUS approved

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Last modified August 13 22:39 EDT 2022. Contains 356109 sequences. (Running on oeis4.)