cp's OEIS Frontend

A221451 Hilltop maps: number of 6Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 6Xn array.

%I A221451 #6 Jul 23 2025 01:57:00
%S A221451 1,1201,65569,2897357,157933741,8569227073,456064257841,
%T A221451 24333809830873,1300168164767193,69442977248777937,
%U A221451 3708745793506329473,198080464024573391557,10579291552464655635125,565028486364173641870457
%N A221451 Hilltop maps: number of 6Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 6Xn array.
%C A221451 Row 6 of A221446
%H A221451 R. H. Hardin, <a href="/A221451/b221451.txt">Table of n, a(n) for n = 1..65</a>
%e A221451 Some solutions for n=3
%e A221451 ..1..0..0....1..1..0....1..0..0....0..1..1....1..1..1....0..1..0....0..1..1
%e A221451 ..0..1..1....1..0..0....0..1..0....0..1..1....1..1..1....1..1..0....1..1..0
%e A221451 ..1..1..1....0..1..0....0..0..1....0..1..1....0..0..1....0..1..1....1..1..0
%e A221451 ..0..1..0....1..0..1....1..1..1....1..1..1....1..0..1....1..1..1....1..1..1
%e A221451 ..1..1..0....1..0..1....1..0..1....0..0..0....1..1..1....1..1..0....1..1..1
%e A221451 ..1..0..1....0..1..1....0..1..1....1..1..0....0..0..1....1..0..1....0..1..0
%K A221451 nonn
%O A221451 1,2
%A A221451 _R. H. Hardin_ Jan 17 2013