1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences.
A209549
1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences.
Terms
- a(0) =191a(1) =3051a(2) =46515a(3) =723636a(4) =11226644a(5) =174401424a(6) =2708892873a(7) =42079740150a(8) =653660484008
External references
- oeis: A209549