Number of 4Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
A208875
Number of 4Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
Terms
- a(0) =15a(1) =1979a(2) =324682a(3) =52947540a(4) =8624977114
External references
- oeis: A208875