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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

%I

%S 1,15,511,65535,33552513,68715299265,562915602593793

%N 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

%C Diagonal of A218242

%e Some solutions for n=3

%e ..1..1..0....0..1..0....1..0..1....1..0..1....0..1..0....1..1..0....0..1..0

%e ..0..1..0....0..1..0....0..0..1....0..0..1....1..0..1....0..1..1....0..0..0

%e ..0..1..1....1..1..0....1..1..1....1..1..0....1..0..1....0..1..1....1..0..1

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 24 2012

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Last modified March 4 05:42 EST 2021. Contains 341779 sequences. (Running on oeis4.)