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A218235 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..3 n X n array 0
1, 15, 511, 65535, 33552513, 68715299265, 562915602593793 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A218242
LINKS
EXAMPLE
Some solutions for n=3
..1..1..0....0..1..0....1..0..1....1..0..1....0..1..0....1..1..0....0..1..0
..0..1..0....0..1..0....0..0..1....0..0..1....1..0..1....0..1..1....0..0..0
..0..1..1....1..1..0....1..1..1....1..1..0....1..0..1....0..1..1....1..0..1
CROSSREFS
Sequence in context: A218312 A218280 A218632 * A212739 A009068 A268960
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 24 2012
STATUS
approved

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Last modified June 12 10:35 EDT 2024. Contains 373331 sequences. (Running on oeis4.)