# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a209910 Showing 1-1 of 1 %I A209910 #5 Mar 31 2012 12:37:30 %S A209910 399930,152153160,53888573444,19391662870652,6954596004028468, %T A209910 2497054784947973388,896278100477366851795,321743305461455008300382, %U A209910 115494087693753318505527463,41458747023669964452852387044 %N A209910 Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences %C A209910 Column 5 of A209913 %H A209910 R. H. Hardin, Table of n, a(n) for n = 1..210 %e A209910 Some solutions for n=4 %e A209910 ..3..1..3..1..0..0....2..2..3..1..1..2....1..0..0..1..0..3....1..2..1..3..2..1 %e A209910 ..3..0..1..2..1..3....3..0..3..0..3..1....2..1..3..0..1..3....3..1..3..1..0..2 %e A209910 ..1..1..3..1..3..2....0..1..1..1..1..2....1..3..0..1..0..1....1..0..3..0..3..3 %e A209910 ..0..3..0..0..1..0....2..3..0..3..0..3....3..2..3..1..3..2....3..2..2..3..1..0 %e A209910 ..1..2..2..3..3..2....0..0..3..0..3..2....2..1..2..3..2..0....0..0..3..0..3..0 %K A209910 nonn %O A209910 1,1 %A A209910 _R. H. Hardin_ Mar 15 2012 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE