Equals two maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX6 array.
A221289
Equals two maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX6 array.
Terms
- a(0) =12a(1) =792a(2) =48298a(3) =2890017a(4) =172905144a(5) =10344276279a(6) =618825190371
External references
- oeis: A221289