1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences.
A209552
1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences.
Terms
- a(0) =6049a(1) =490547a(2) =35741496a(3) =2708892873a(4) =203828058161
External references
- oeis: A209552