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 A228682 #7 Sep 02 2013 13:01:23 %S A228682 34,508,8832,152048,2644336,46125216,806190208,14105294112, %T A228682 246929287360,4324094979072,75733743499264,1326545935320192, %U A228682 23236786328620160,407043788171511808,7130373880883372800,124906998542616448512 %N A228682 Number of nX7 binary arrays with no two ones adjacent horizontally, diagonally or antidiagonally. %C A228682 Column 7 of A228683 %H A228682 R. H. Hardin, <a href="/A228682/b228682.txt">Table of n, a(n) for n = 1..210</a> %F A228682 Empirical: a(n) = 30*a(n-1) -226*a(n-2) -108*a(n-3) +4324*a(n-4) -1612*a(n-5) -27016*a(n-6) -2240*a(n-7) +50112*a(n-8) +20032*a(n-9) -16768*a(n-10) -4864*a(n-11) +2048*a(n-12) %e A228682 Some solutions for n=4 %e A228682 ..0..0..1..0..1..0..0....0..0..0..0..1..0..0....0..0..1..0..0..0..0 %e A228682 ..1..0..0..0..0..0..1....0..0..1..0..1..0..0....1..0..0..0..1..0..1 %e A228682 ..1..0..1..0..0..0..1....0..0..1..0..0..0..0....1..0..1..0..1..0..0 %e A228682 ..1..0..0..0..0..0..1....1..0..1..0..0..0..1....1..0..1..0..0..0..1 %K A228682 nonn %O A228682 1,1 %A A228682 _R. H. Hardin_ Aug 30 2013