Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 4Xn array.
A220961
Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 4Xn array.
Terms
- a(0) =1a(1) =94a(2) =1224a(3) =33708a(4) =627760a(5) =11214779a(6) =190881959
External references
- oeis: A220961