1/4 the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having distinct clockwise edge differences.
A209709
1/4 the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having distinct clockwise edge differences.
Terms
- a(0) =24a(1) =175a(2) =1241a(3) =8876a(4) =63280a(5) =451762a(6) =3223192a(7) =23003132a(8) =164145204a(9) =1171382040a(10) =8359002576a(11) =59650984184a(12) =425673977552
External references
- oeis: A209709