Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.
A251299
Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9.
Terms
- a(0) =1950036a(1) =71163896a(2) =3313122288a(3) =203797267488
External references
- oeis: A251299