Number of 3Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than itself.

A266035

Number of 3Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than itself.

Terms

    a(0) =1a(1) =55a(2) =481a(3) =5594a(4) =121029a(5) =2045306a(6) =33026298a(7) =562735444a(8) =9532097947a(9) =160132082576

External references