Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array.
A220793
Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array.
Terms
- a(0) =4a(1) =76a(2) =1753a(3) =32507a(4) =563715a(5) =9507244a(6) =156493963a(7) =2544887030
External references
- oeis: A220793