1/120 the number of (n+1)X7 0..4 arrays with every 2X2 subblock containing four distinct values.
A183619
1/120 the number of (n+1)X7 0..4 arrays with every 2X2 subblock containing four distinct values.
Terms
- a(0) =7776a(1) =446976a(2) =25713200a(3) =1498220176a(4) =87799260864
External references
- oeis: A183619