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 A217644 #6 Jul 22 2025 23:42:34 %S A217644 163,3121,166193,7531727,374406369,18482872753,912173011699, %T A217644 45172801496675,2234877786749541,110611616704879795, %U A217644 5474859780340931141,270972286809199358975,13411953206311122874641,663829781516203470875045 %N A217644 Number of nX7 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX7 array. %C A217644 Column 7 of A217645 %H A217644 R. H. Hardin, <a href="/A217644/b217644.txt">Table of n, a(n) for n = 1..19</a> %e A217644 Some solutions for n=3 %e A217644 ..0..0..2..1..0..0..0....0..0..1..1..2..1..1....0..0..1..1..0..0..1 %e A217644 ..0..1..2..1..0..0..0....0..1..1..0..0..0..1....0..1..2..0..0..0..2 %e A217644 ..1..2..1..1..0..0..2....1..2..0..0..0..0..2....1..2..0..0..0..1..2 %K A217644 nonn %O A217644 1,1 %A A217644 _R. H. Hardin_ Oct 09 2012