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.
%I A219076 #6 Jul 23 2025 00:12:47 %S A219076 31,2435,134809,7561349,433704331,24734141495,1410242020653, %T A219076 80444813963129,4588436794733591,261712432286491659, %U A219076 14927540586501299193,851435525780779197693,48564066186463152044491,2769991245247350703909311 %N A219076 Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 nX6 array. %C A219076 Column 6 of A219078 %H A219076 R. H. Hardin, <a href="/A219076/b219076.txt">Table of n, a(n) for n = 1..66</a> %e A219076 Some solutions for n=3 %e A219076 ..1..0..1..1..0..1....0..1..0..1..0..0....0..1..1..1..1..1....1..1..1..1..1..1 %e A219076 ..0..1..0..0..0..1....0..0..1..0..1..0....1..0..1..1..1..0....0..0..1..0..0..1 %e A219076 ..0..0..1..1..1..0....1..0..1..1..1..0....1..1..1..0..1..1....1..0..1..1..1..0 %K A219076 nonn %O A219076 1,1 %A A219076 _R. H. Hardin_ Nov 11 2012