1/24 the number of (n+1)X7 0..3 arrays with every 2X2 subblock containing exactly three distinct values.
A183591
1/24 the number of (n+1)X7 0..3 arrays with every 2X2 subblock containing exactly three distinct values.
Terms
- a(0) =417152a(1) =293504588a(2) =202888369698
External references
- oeis: A183591