Number of 3Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
A221485
Number of 3Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =0a(1) =16a(2) =50a(3) =1407a(4) =11784a(5) =182524a(6) =2017564a(7) =26614749a(8) =319184574a(9) =4025795483a(10) =49427052472a(11) =615583634915
External references
- oeis: A221485