Number of (n+1)X(6+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3.
A251341
Number of (n+1)X(6+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3.
Terms
- a(0) =397000a(1) =12022920a(2) =486098916a(3) =27005232676
External references
- oeis: A251341