Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order.

A215900

Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order.

Terms

    a(0) =2a(1) =2a(2) =15a(3) =42a(4) =726a(5) =2906a(6) =84550a(7) =433252a(8) =18378580a(9) =113503692a(10) =6485270720a(11) =46538017584

External references