Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any antidiagonal neighbor (colorings ignoring permutations of colors).

A208782

Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any antidiagonal neighbor (colorings ignoring permutations of colors).

Terms

    a(0) =2a(1) =10a(2) =114a(3) =2066a(4) =52922a(5) =1788850a(6) =76282138a(7) =3974779402a(8) =247083681522

External references