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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A219077 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 nX7 array.

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%I A219077 #6 Jul 23 2025 00:12:54
%S A219077 57,9367,1023441,113959413,12998933707,1473655240387,167024618548071,
%T A219077 18939932662217929,2147519964457580465,243494396494378271955,
%U A219077 27608646901560676777421,3130407281278669890215213
%N A219077 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 nX7 array.
%C A219077 Column 7 of A219078
%H A219077 R. H. Hardin, <a href="/A219077/b219077.txt">Table of n, a(n) for n = 1..119</a>
%e A219077 Some solutions for n=3
%e A219077 ..0..1..1..1..1..0..0....0..1..1..1..0..0..0....0..0..1..0..1..0..0
%e A219077 ..0..1..0..0..0..1..0....0..1..1..1..0..1..1....0..1..1..0..0..1..1
%e A219077 ..0..1..1..0..1..1..0....0..1..1..1..1..0..0....0..1..0..0..1..0..1
%K A219077 nonn
%O A219077 1,1
%A A219077 _R. H. Hardin_ Nov 11 2012

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