Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3.
A251342
Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3.
Terms
- a(0) =2190625a(1) =99776859a(2) =6775415354a(3) =687109914883
External references
- oeis: A251342