Number of nX7 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.
A206691
Number of nX7 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.
Terms
- a(0) =16a(1) =1216a(2) =11264a(3) =127008a(4) =1454810a(5) =17277556a(6) =208563912a(7) =2543024548a(8) =31198656992a(9) =384076975680
External references
- oeis: A206691