# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a221293 Showing 1-1 of 1 %I A221293 #3 Jan 09 2013 12:49:22 %S A221293 1,114,3332,123958,4983598,172905144,6138441061 %N A221293 Equals two maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 5Xn array %C A221293 Row 5 of A221290 %e A221293 Some solutions for n=3 %e A221293 ..0..0..1....0..0..0....0..0..0....0..0..1....0..1..0....0..1..0....0..1..1 %e A221293 ..0..0..0....0..1..0....0..0..1....1..0..0....1..0..1....0..0..0....1..0..1 %e A221293 ..0..1..0....1..1..0....1..0..0....0..0..0....1..0..1....0..0..0....1..1..0 %e A221293 ..0..1..1....1..0..0....0..1..1....1..1..0....1..0..1....1..0..1....0..1..1 %e A221293 ..0..0..0....0..0..0....1..0..0....1..0..0....0..1..0....1..1..0....1..0..0 %K A221293 nonn %O A221293 1,2 %A A221293 _R. H. Hardin_ Jan 09 2013 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE