Number of (n+1)X4 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order.
A209964
Number of (n+1)X4 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order.
Terms
- a(0) =9a(1) =665a(2) =25435a(3) =870686a(4) =27112487a(5) =795773818a(6) =22419183624a(7) =613401570788
External references
- oeis: A209964