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 A217643 #6 Jul 22 2025 23:42:28 %S A217643 77,959,29101,779051,22516459,644993621,18482872753,531602056509, %T A217643 15267905480487,438705879899041,12606649476815151,362239882955092205, %U A217643 10409031887717391513,299103662135939293765,8594751629843753626189 %N A217643 Number of nX6 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX6 array. %C A217643 Column 6 of A217645 %H A217643 R. H. Hardin, <a href="/A217643/b217643.txt">Table of n, a(n) for n = 1..18</a> %e A217643 Some solutions for n=3 %e A217643 ..1..1..2..0..0..0....1..1..1..1..1..0....0..0..1..1..2..2....1..1..0..0..0..2 %e A217643 ..1..1..2..0..0..0....0..0..2..1..0..0....0..0..0..0..0..0....0..0..0..0..2..0 %e A217643 ..1..1..1..0..0..2....0..0..2..0..0..0....0..0..0..0..0..0....0..0..1..2..0..0 %K A217643 nonn %O A217643 1,1 %A A217643 _R. H. Hardin_ Oct 09 2012