1/4 the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having distinct edge sums.
A209729
1/4 the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having distinct edge sums.
Terms
- a(0) =22a(1) =124a(2) =696a(3) =3912a(4) =21976a(5) =123480a(6) =693752a(7) =3897880a(8) =21900088a(9) =123045592a(10) =691329528a(11) =3884227224a(12) =21823477432a(13) =122614931544a(14) =688910387576
External references
- oeis: A209729