Number of 2Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
A208582
Number of 2Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
Terms
- a(0) =2a(1) =12a(2) =152a(3) =3024a(4) =84124a(5) =3057664a(6) =139056380a(7) =7675358704a(8) =502604958608
External references
- oeis: A208582