1/4 the number of (n+1)X3 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.
A209710
1/4 the number of (n+1)X3 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.
Terms
- a(0) =175a(1) =2710a(2) =40600a(3) =614935a(4) =9278940a(5) =140274002a(6) =2118517533a(7) =32012611741a(8) =483591817235
External references
- oeis: A209710