Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of a 3 X n array with new integer colors introduced in row major order.

A216613

Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of a 3 X n array with new integer colors introduced in row major order.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =15a(4) =41a(5) =716a(6) =2847a(7) =83440a(8) =426422a(9) =18171918a(10) =112072316a(11) =6423127757a(12) =46054057965

External references