Equals two maps: number of 6Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 6Xn array.
A221294
Equals two maps: number of 6Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 6Xn array.
Terms
- a(0) =1a(1) =351a(2) =19996a(3) =1686304a(4) =143511784a(5) =10344276279
External references
- oeis: A221294