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A221452 Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 7Xn array.

%I A221452 #6 Jul 23 2025 01:57:07
%S A221452 1,4063,437437,36364977,3888200065,414116287743,43045366565233,
%T A221452 4487793927664209,468786655087266657,48944887790539796639,
%U A221452 5109638176609475597301,533452901877309087321537
%N A221452 Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 7Xn array.
%C A221452 Row 7 of A221446
%H A221452 R. H. Hardin, <a href="/A221452/b221452.txt">Table of n, a(n) for n = 1..45</a>
%e A221452 Some solutions for n=3
%e A221452 ..0..1..1....0..1..0....0..1..1....0..1..0....0..1..0....0..1..0....0..1..1
%e A221452 ..0..0..0....0..1..0....0..0..1....0..0..1....1..1..1....1..1..1....0..1..0
%e A221452 ..0..1..0....0..0..1....1..0..1....1..1..1....0..1..1....1..1..1....0..0..1
%e A221452 ..1..0..1....1..1..1....0..1..1....0..0..1....1..0..0....0..0..1....1..0..0
%e A221452 ..0..1..1....1..1..1....0..1..1....0..1..1....0..1..0....1..0..0....1..1..1
%e A221452 ..0..1..0....1..0..1....0..1..1....0..1..0....1..0..1....0..1..1....0..0..1
%e A221452 ..1..1..0....1..0..1....0..1..1....1..1..1....0..1..1....1..0..1....1..0..1
%K A221452 nonn
%O A221452 1,2
%A A221452 _R. H. Hardin_ Jan 17 2013